Thanks to Will for the point to Tim Wang's elearning blog via Twitter.

Check this out! First question you should ask yourself is-- what in my current curriculum would have nurtured this creativity and innovation in this student? Ok. Now watch! Wiis aren't just for gaming! I am running and buying extra Wii remotes today!

"The high-end smart board / screen overlay can cost as much as the LCD
or data projector itself (up to $2000-$3000 easily). Then a much
cheaper and yet more powerful solution came across (thanks to Ulrich
Rauch), it seems one can convert a Wii remote into a multi-point
infrared reader, with a few infrared sensors, you can turn any flat
surface (Plasma TV, LCD, Projector Screens and even a coffee table)
into a smart board!"

Here is Johnny Lee's Wii Tricks Site

Look at this one-  the next video where Johnny takes this Wii Remote hack up a notch - Minority Report technology in real life for less than $100!