Comics!
Nina Paley. One of my very favorite obscure chick cartoonists. She don't get nearly enough attention, so go look at her art right now. Be warned: she disapproves of babies. :)
Alison Bechdel. More great obscure chick comics. LESBIAN chicks, even! Beautiful pen-n-ink art and involving characters.
Donna Barr. You guessed it, another arty lady. Her comic book, "The Desert Peach" is a one of the finest chunks of historical fiction I've seen in quite some time.
Other nifty comics: Sluggy Freelance, Bone, Sinfest, All the Salon comics.
Art Galleries!
YERF. Quality-controlled cartoon animals. Be there or be square. :)
Elfwood. Some lovely fantasy art, and a whole lot of rotten fantasy art. If you're prepares to wade through a lot of junk, there are some real gems here.
Entomology!
My lab. Bugs and bugs and yet more bugs. Where I draw stuff like this.