Check out this video where Matthieu Deru and Simon Bergweiler, two grad students, show off their unique endeavor. They supposedly used Homebrew software to translate on-board motions of the Wii Fit board to something the PC could understand, and connected the two via Bluetooth. While the practical use of it is questionable since raiding/PvPing for hours at stretch while standing on your feet will kill even the most Alterac Valley hardened WoW-ers, you’ve got to admit, playing a non-fitness or non-console game using the Wii Fit board sounds like fun!
Nintendo should of thought of this first. 
