Following on from http://mobilebeamer.wordpress.com/2007/06/01/surface-computing/ …

A very cool demonstration of just how useful the Nintendo Wii can be …

http://youtube.com/watch?v=5s5EvhHy7eQ

The author has a bunch of other videos about similar Nintendo Wii hacks, all very cool and most importantly accessible to pretty much anyone with a Wii and a small extra outlay.