Try House of Moves. (www.moves.com) They have a pack that has some neat ones. Like a walking, running, kungfu, dancing, etc. nice stuff. They did the motion cap for Titanic, so they work nicely, but sometimes the figures "slide" when they shouldn't. Check it out. (if you want to see an example, I'll try to post one soon at students.washington.edu/hoborg/kungfu.avi)