found this on hackaday and thought it was cool

http://www.youtube.com/watch?v=XgrGjJUBF_I

sorry if somone posted it already i couldnt find it when i searched

also check this one out he used a wimote to make a projector white board .. sick

http://www.youtube.com/watch?v=5s5EvhHy7eQ
he has a few cool videos under his name