Camera and film manufactures:
the camera company, Madison WI, west: (608) 833-1411, downtown: (608) 256-0011, east: (608) 246-9052
camera and darkroom, Santa Fe (and Albuquerque), Galisteo (505) 983-2948 (sometimes this place is a bit overpriced)
KEH is a pretty good online shop, especially for used gear.
Adorama in NYC, this is where all my film and new camera gear comes from.
A GREAT repair shop in Madison: B.D.C. Camera Repair - 313 West Johnson Street Madison, Wi 53703, (608) 257-6315
Visions photo-lab: Santa Fe, New Mexico (505-986-9076). This place rocks, I have gotten my best results from them.
Burne Photo Imaging, Inc. - 4289 West Beltline Hwy , Madison WI 53711, (608) 277-0802. This place does great work, I use them when I am in Madison.
Photo craft imagining: Boulder, CO. This place is suppose to be great, I haven't worked with them much yet, but I will.
Edward Weston the master of course.
Ken Rockwell This site is a great photography resource.
Cameron Lawson who is a fantastic (climbing) photographer and a really nice guy.
John Shaw who is a living legend in nature photography.