This one takes a while to get to the best bits, but it’s definitely worth the watch. I just can’t wait to see games (not that I’m a mad gamer or anything) that are developed using this technology!
Head Tracking for Desktop VR Displays using the WiiRemote
All this software is developed by Johnny Lee. Nintendo should really hire this guy… http://www.cs.cmu.edu/~johnny/projects/wii/

WOW, I am not a gamer either but I was NOT expecting that! I think the next generation of kids are going to be VERY easy to entertain.
Here’s Johnny giving a talk about this technology at TED http://www.ted.com/talks/view/id/245