Jude just came back from the WIU vendor show in one of the interesting things that he came back with was a demonstration of using the Wiimote as a multipoint interactive whiteboard. The link I will give you is from engadget and has it pretty neat video showing how works. I think I'd love to have one of these right at my desk and have it pointing onto my desk surface.
"While certainly there's been no shortage of Wiimote hacks, the number of genuinely useful ones has been considerably more limited. It looks like you can now add one more to that list, however, as Johnny Chung Lee (he of the Wiimote finger-tracking hack) has now upped the usefulness even further with a makeshift multi-point interactive whiteboard. There's a bit more involved with this one than just a Wiimote, however -- namely, an IR-emitting pen (or two), which the Wiimote tracks while relaying all the necessary information back to a PC. That, as the video after the break shows, allows you to turn any surface into a multi-point whiteboard with the use of a projector, or turn any LCD screen into a touchscreen, of sorts. Best 
of all, Johnny has kindly provided the necessary software free of charge, so hit up the read link below if you want to give it a shot."
Johnny Chung Lee Project - Wii Johnny is a Graduate PhD student at CMU and has several other projects that he has posted to this site using the Wiimote for other tracking experiments. The 3-D is pretty neat as well. He has a blog at: http://procrastineering.blogspot.com/ called procrastineering. Enjoy!
