Print Access is a great listing of print and media resources.
Here is another good listing of printer resources.
HERE is an exhaustive list of book printers.
Blurb is one of the largest Self-Publishing/DIY digital book printers.
Lulu is another self-publishing/DIY book printer, offering publishing options through Amazon.com.
Vistaprint offers a very wide range of printed products.
Uprinting also offers a wide range of printed materials.
Mimeo is another one, specializing in brochures and pamphlets.
Print Place has a variety of products with many options for different sizes.
Edition One offers high quality short run printing for photo books. They also have a nice blog showing their process.
Shapco is a high end printing facility that specializes in fine art publications.
Trifolio is a premiere fine art publisher.
The Studley Press are fine art and commercial printers.
GHP is a very high quality offset lithography and digital printing facility.