Ok, this is super fricking cool. I have a few web cam's lying around. Maybe I can find some time to build something like that myself...That and the other 50 projects I want to work on =(

I guess most of the people reading this will have seen some of the multi-touch demos by Jeff Han, Apple and Tactiva. I wanted to play around with some ideas that required a multi-touch pad, but there aren't any devices available (Tactiva aren't shipping...)

Long story short, I made a simple one from a plastic bag, some dye and a camera: