TouchDesigner: The Mutant Node
It's a big goal of mine to find ways to do similarly rad stuff that I've done using the Kinect with only a webcam. I plan to take to the road with some of my interactive work for my thesis project in a year from now, and I hope to teach students without much money how affordable the digital arts can be compared to other forms - so I'm working my little buns off figuring out ways to use a normal everyday webcam instead of a hard to find depth cam.
This project uses motion detecting via the Cache & Difference TOPs, Blob Detection, Displacement, Feedback, and a few other tricks to get somewhere similar to what I've done with body tracking via the Kinect.
I got a lot of requests for this .toe file. It's posted on the Touch forums, but of course I'm going to include it here as well.