MPIX - http://www.mpix.com/
I have used MPix for quite some time, along with a few others on this list. I love the MPix web user interface and list of pro photo printing options. In all likelihood, these guys will print the latest business card design I have come up with. The business cards I'm designing are mine. An interesting note: I have not had business cards in over four years. I am consistently reminded of this every time I am reminded of an old off-road racing friend and mentor, Bob Bower, who politely chastised me at a Best In The Desert  (BITD) Parker 425 off-road race. After chatting at the motorcycle pits of Andy Grider and Mikey Childress, he asked me for my number, and when I didn't produce a business card, he delivered his two-sentence speech that cut quickly to the point and delivered much wisdom. Needless to say, I am taking his words to heart.

• ABOUT - Mpix is a division of Miller’s Professional Imaging. Miller’s was founded in 1939, and is the largest professional photography lab in the United States. The company has production facilities in Pittsburg, Kansas and Columbia, Missouri. Commitment to Quality and Turnaround Mpix has unparalleled quality of products and services in the photographic printing industry. Mpix doesn't stop with quality, our turnaround is equally as impressive. Almost all orders ship in 24 hours. Most orders in by noon ship the same day. Everything you order from Mpix is produced with the same professional care and attention to detail that professional photographers have experienced for decades from Miller's. In fact, Popular Photography gave Mpix top honors in overall quality of prints during their review of online printers last year. Don't take our word for it - read what our customers have to say. How Mpix Works Ordering from Mpix is easy. All you need is your photos and then we'll help you turn them into beautiful prints and products. With Mpix, a photographer is able to upload images to a secured website, store and share images in albums, and order professional prints, professional finishing services, and specialty products.

PRINT ROOM - http://www.printroom.com/
Print Room photo printing was one of my favorite photo printer back in the day. I still maintain an account. From my memory, its website backend business interface was an example for good web usability best practices. And most of all, I loved the drop shipping options and its website's user interface. Prices and options were on par with the photography industry. Photo prints, photo gifts, photo cards, sports products, wedding products, photo finishing and image download repository options exist on its platform. I have used most of them and give them the thumbs up.

• ABOUT - At Printroom, our mission is to help photographers with their business—providing the backend printing, sales and support that is such an important part of being successful, but which most photographers aren't prepared to handle. We transform the process by allowing photographers to spend more time behind the camera, and less time handling sales and customer service.  Get to know the people behind the company. Printroom has been in business since 1999, and is located in Santa Clara, CA. If you don't know where that is, it's in what is commonly known as "Silicon Valley", about 45 minutes south of San Francisco.  Printroom is a venture-backed privately-owned company that started with three founders who are all still active members of our management team. We have over 15,000 Pro members which means that the bulk of our staff is made up of account managers and support staff who are here to build and maintain a relationship with you.  In addition to working with professional photographers, we also have a fan photography division that works directly with entertainment and sports companies such as NASCAR, Justin Timberlake, Barbra Streisand, various baseball teams, and even Nasdaq.

COSTCO PHOTO PRINTING - http://www.costco.com/PhotoCenter/PhotoCenter.aspx
Need cheap photo printing? Need it fast? Need it clean? Costco photo printing is an excellent option for professional photographers as well as amateur photographers. I have a few commercial photographers I know, some who primarily print portraits and others who do bulk printing, who use them regularly or almost exclusively, respectively. While Costco does not, to my knowledge, have highly specialized photo printing, Costco's finished product is great at the best price. Just get them the image and pick up within an hour or so.

MILLERS PROFESSIONAL IMAGING - http://www.millerslab.com/
Several photographer friends from way back in the day use Millers photo printing lab. I have even used them. They are a great resource. Most photographers I know of who use Millers are wedding photographers or school photographers. They have a highly professional and sophisticated website interface. While Millers photo printing was not the lab I most used during my printing days, I was a regular customer and may make use of them for one photo assignment coming up next month.

• ABOUT - Miller's Professional Imaging has grown to be the largest professional lab organization in the United States. We provide professional prints and press products for professional photographers in all fifty states. Since our inception, we have developed a reputation for having the highest quality products, customer service, and technologies in the industry, all of which have contributed to becoming the preferred lab of professional photographers nationwide.  Miller's Professional Imaging began above Bill Miller's studio in downtown Pittsburg in 1964. Knowing he was limited in growth in this location, Bill constructed a new 3,900 square-foot facility in 1968 where it still stands on East Jefferson Street. Since that time and with ten building expansions, the Pittsburg facility has grown to 80,000 square feet in size. In order to meet the needs of the digital age, Miller’s built a second, state-of-the-art, 40,000 square-foot facility in March of 2001. In 2003, Miller’s launched Mpix, a fully web-based digital imaging lab to service the new, emerging professional market.  Miller’s has a rich history in photography. Bill Miller was a portrait and wedding photographer before World War II. During the war, he was a cinematographer filming much of the footage we still see on television documentaries. Besides receiving his Masters in photography, Bill was also a recipient of the ASP Fellowship. Bill's son Richard is now CEO of Miller’s. He is a Master Photographer, twice having been named Kansas Photographer of the Year. Vice President, Dick Coleman, is also a Master Photographer. Dick's son Todd Coleman is President and COO.

PE PHOTO - http://www.pephoto.com/
I've never tried the PE Photo photography printing service.

• ABOUT - PEphoto is a leading digital online developing service. We are a private, family-owned business created in 1981. Our company foundation is built upon delivering high quality photo prints with the best prices and best service. We carry an enthusiasm for digital photography and wish to bring photos at the best prices possible to consumers and professionals.  We are constantly updating our services as we make available more services that offer our customers more opportunity to expand their creativity. As a leader that has gained a loyal following of digital photographers from around the world, PEphoto will continue to provide the same service and quality that our customers have come to know and trust.  Our orders are processed at our central facility in New York City. We work with 2,000 partners in the New York City Metropolitan area to deliver their digital prints every day. Our online service allows immediate delivery for most photo orders to our NYC dealers, usually within 24 hours and at a low delivery charge.  We take pride in delivering the best service in the photo industry. We are members of the Photo Marketing Association (PMA & its subsidiaries) and Wedding & Portrait Photographers International (WPPI). We are also a preferred client for Kodak Film.

FOTO WORKS PRO - http://www.fotoworkspro.com/
Fotoworks Pro photo printing looks like a great option for pros. I am tempted to give them a try. While location is relatively unimportant, due to drop shipping options and speedy product delivery, photographers living in Southern California's Orange County area may find its strategic location a bit more amiable than other photographers throughout the union.

• ABOUT - Located in Orange County (aka The OC), Southern California, Fotoworks has been serving professional photographers for the past 14 years. The beautiful landscape and affluent communities are some of the reasons why Orange County is the destination for some of the most breathtaking weddings and home to many of the nations foremost photographers.  Our Mission To be the premier professional imaging service business in our market by:  Helping our customers achieve success in their business through quality products, education and the highest level of customer service.  Achieving and maintaining the top position in our market in terms of customer satisfaction, market share, revenue generation, product margin and operating profit.  Treating all employees with respect while recognizing and rewarding performance that exceeds expectations.  Value & Beliefs Fotoworks was founded on a set of core values and beliefs which are essential to the progress and continued success of our company.  Conduct business with honor Truth, honesty and integrity are the basic foundations of all our business practices. Life is too short to be ashamed of anything we do.  Do everything with utmost sincerity Every task that we do, be it big or small, is done with our very best effort. We do what we do because it's our sincere passion.  Treat people the way that you would like to be treated This simple rule applies to all our customers, employees and vendors.

SHUTTERFLY - http://www.shutterfly.com/
I have never used the Shutterfly photo printing service, but like the option that exists with many photo gallery web software to use Shutterfly as the printing option. Shutterfly's early brand marketing image never got me thinking it was professional grade. Therefore, I have never elected to enlist it for my professional printing needs. Perhaps one day.

• ABOUT - We are a leading Internet-based social expression and personal publishing service that enables consumers to share, print and preserve their memories by leveraging our technology-based platform and manufacturing processes. Today, our primary focus is on helping consumers manage their memories through the powerful medium of photos. We provide a full range of products and services that make it easy, convenient and fun for consumers to upload, edit, enhance, organize, find, share, create, print and preserve their digital photos in a creative and thoughtful manner.  Consumers use our products and services to stay connected to their friends and family, to organize their memories in a single location, to tell stories and to preserve their memories for themselves and their children.  Our vision is to make the world a better place by helping people share life’s joy.  Our mission is to build an unrivaled service that enables deeper, more personal relationships between our customers and those who matter most in their lives.  We believe that people have an intrinsic desire for social expression, as they wish to capture and share their experiences and pass them on to future generations. Since the beginning of humankind, people have shared detailed stories of their lives through visual expression. Today, with the evolution of digital cameras and technology, millions of people around the world are capturing their memories and communicating in deeper, more meaningful ways. # share and preserve memories for family, friends and themselves; # organize all of their photos in a single, safe and easily accessible location; # maintain emotional connections to friends and family, despite being time-constrained, through thoughtful and personal photo-based communications and gifts; and # achieve satisfaction and self-expression through creativity and telling stories with photos.

SNAPFISH - http://www.snapfish.com/
Snapfish is yet another of the photography printing options usually included with some social media photo applications or as printing options for free photo gallery scripts. I have never used it and have always considered it too consumer orientated for my liking. That's not to say they are not worthy of my business, but they have yet to entice me to do so.

• ABOUT - Snapfish by HP is the number one online photo service, with more than 70 million members in over 20 countries and 2 billion unique photos stored online.  Snapfish is a division of HP, one of the world's largest and most trusted technology companies.  With Snapfish, you'll enjoy:   * Secure, unlimited online photo sharing & storage  * Professional-quality prints for as low as 9¢ each  * Over 100 customizable photo gifts, from display-quality photo books and posters to photo mugs and jewelry  * Our 110% quality guarantee and the Snapfish Price Promise  * Free online photo editing tools  * Private group rooms for sharing with friends & family  * Free uploading from your mobile phone  * Subscription video sharing & storage plans Our mission is to help you preserve, enjoy, and make the most of your memories, while providing the best value at the same time. Create a free account today to see why Snapfish is the best value in photography! Since 2004, Snapfish has expanded to 22 countries worldwide, making it the largest international photo service in the world. From Australia and Asia to Europe and Canada, Snapfish offers the best value in photography in more than 18 different languages.  We're continually adding more countries in every region of the world, helping Snapfish customers around the globe store, share, print, and enjoy their photos in a secure, online location.