Poor man's projection touch-screen, and wii-3-D

My Dad heard about this guy at TED.
It's a couple really clever ways to hack the IR camera in a wii-mote.
http://www.youtube.com/watch?v=5s5EvhHy7eQ
http://www.youtube.com/watch?v=Jd3-eiid-Uw
http://www.youtube.com/watch?v=eBGIQ7ZuuiU

The guy's main site is at http://www.cs.cmu.edu/~johnny/projects/thesis/
and it seems as if the 3-D technology will make it into a game coming out soon. There are a couple other amazingly dorky things on his site that don't have to do with a wii-mote. Even so, they're still pretty interesting.