Go to Video Tutorials->Archive->Character Project - Rigging
It's not really completed though
he says he's going to talk about things, but those videos aren't there...and some stuff is skipped. But it still is pretty cool. Shows how to paint weights, set up the skeleton, create blend shapes, etc. Good stuff..also, under
Video Tutorials->Animation->Rigging for the low poly man
You get to see how kurt skins, and binds, and paints weights...that one is a complete tutorial set, i believe, but i haven't finished it, so i'm not 100% certain. Kurt's good about showing everything he does though.