Wow, this is really cool. Some smart people (Senior engineering students at Univ. of Alabama) out there have written a program to use the accelerometer in a Wiimote to help train people to do CPR correctly. The program is not available yet, but should be on the American Heart Association webstie in early fall 2009.
What makes this really cool is that it is a perfect example of an inquiry based project. While it was developed by seniors in college it could probably have been done by high school students. The skills needed to create this would be within the grasp of students I've had. It makes me wonder what other problems could be solved with the accelerometer in a wiimote...
For those interested in cool applications of Wii technology:
cross posted from FlosSceince