The Color Pencil Challenge - Art Lessons from the Experts (art, forums, products, too)
http://cpchallenge.com/index.html
*Check out their Past Challenges for some good stuff!

Dee Dreslough's Tutorials (LOTS of dragon- and fantasy-related tutorials)
http://www.dreslough.com/main/tutorials.htm

Elfwood's Fantasy Art Resource project (F.A.R.P - "The FARP is a free guide to Fantasy&SciFi art/story creation, history, techniques and much more...")
http://elfwood.lysator.liu.se/farp/

Goldenwolf's Tutorial (excellent canine paws tutorials)
http://goldenwolfen.com/artist/tutorials/

Katherine Dinger's Tutorials (excellent Photoshop coloring tutorials, with specifics on coloring eyes, textures, fur, hair, clouds, more)
http://div.dyndns.org/EK/tutorial/

Kyoht's Tutorials (excellent watercolor & colored pencil and how-to-draw raptor tutorials)
http://kyoht.com/Personal/howto.html

Nambroth's Tutorials: by Jennifer Miller (excellent Photoshop coloring tutorials) NOW UPDATED
http://featherdust.critter.net/tutorials/

Polykarbon Tutorials (Manga/Anime related. Drawing, Photoshop, Paint Shop Pro, Japanese language tips)
http://www.polykarbon.com/tutorials/

Scott Ruggels' Tutorial Collection (excellent inking tutorials)
http://www.rdwarf.com/ruggels

Stephanie Lostimolo's Tips (even more excellent Photoshop coloring tutorials)
http://www.nethersphere.com/tips.html