iSculpt.org

There are some really awesome sculpting videos on YouTube. Here are just a few that I've watched that I think are worth your time if you're interested in sculpting. These are far from the only ones worth watching, but these are ones that I can recommend from first hand viewing.

Shiflett Brothers

If you want to see a completely different way of doing a figure armature, you should watch this video by Shiflett Brothers. These guys really rock, it's worth your time to watch them sculpt (I think it's Jarrod doing this one, but am not sure, since we never see the face).

Philippe Faraut

Another fantastic sculptor is Philippe Faraut, a phenomenal portrait sculptor and teacher. If you don't have his book, you should consider grabbing it; his videos are also awesome, as you can see from the clips on YouTube:

Crazy
Sculpting Demo
Aging Process

I've actually had the great fortune to take some classes from Philippe, and I can assure you that there is no trick photography being used in the sculpting demo video - he really can sculpt that well, that fast.

Ron Mueck

Ron Mueck creates phenomenally realistic works, and his videos are a trip

Part 1
Part 2

There are literally dozens more; many great, a few not so great. If I run across any other must-sees, I'll post the links. If you find any that you feel are worthy of sharing, post 'em in the comments!