ART PAPA FORUMS
A great forum site for artists of all ranges.  Get help and constructive criticism from some fantastic artists.  Graphite forum moderated by JD Hillberry - Animal forum moderated by Mike Sibley

WET CANVAS
Another great forum site for artists of all ranges. 

Art Forums and sites for Artists

STARVING ARTISTS
Mike Sibley's site for all of those Starving Artists out there.  Display, promote, sell, or just show off your work.  You can set up individual pages for your own work at very cheap rates.

Minigallery
This is a fantastic place for artists of all abilities to showcase and sell their artwork. There are currently more than 10,000 pieces of contemporary art for sale online or available by commission by 513 new, emerging and established artists who each self-manage professional online gallery space.