Control your computer using a wiimote and WPF
ok, so you don't need any WPF at all to actually control you computer using a wiimote, but everyone loves the simplicity of making and controlling a gui with WPF that we should use it anyway's! Plus, WPF is just cool. Anyway, using Brian Peek's Managed Library for the Wiimote (I used version 1.2.0.0) you can receive data from the wiimote about its IR coordinates (up to all 4 IR sensors now!) and all of its button states.