CGTALK IS THE BIZ:

It's only recently that I rediscovered the delights and sheer jaw-dropping goodness that is CG TALK a members-only online forum for 2D art & illustration, 3D models and animation. Some of the work on there is unbelievably good. There's also some great forums for technical issues, users of specific software and other goddies associated with 3D art. I recommend it to everybody who gets a kick out of digital art.