http://firoball.de/upload/wiimote.zip

Very small sample application. It shows all recieved values inside a panel.

ESC - leave demo (don't use F10 or the x button of the window - it will crash!)
V - toggle vibration (off by default)
I - toggle infrared camera (off by default)
B - update battery status

All bugs found so far are fixed in this version. It should run pretty stable.