I was impressed before with the capabilities of scratch to interface with the pico boards and LEGO WeDo, but now I think I've found a new favorite. Stephen Howel, a computer science lecturer at the Institute of Technology in Tallaght, Ireland had created a way for Scratch to interface with the Kinect. I suppose this means I'm going to have to get a Kinect...
Check out his video here:
http://vimeo.com/18562642