Have you seen the Grad student from Carnegie Mellon, Johnny Chung Lee and his Wiimote interactive Whiteboard?
http://www.ted.com/index.php/talks/j...ote_hacks.html
Since seeing this, we have modified the ir pen into a wand. Here is a slide on Google Docs that we made
http://docs.google.com/Presentation?...6d5_15c299thfx
We also made his steady cam
http://www.cs.cmu.edu/~johnny/steadycam/
Here is slide show
http://docs.google.com/Presentation?...tns_51ccd9hchs