I'm working on a gesture recognition application for the Wiimote. I'm calling it NNiimote.
The idea is to build a neural network (I'm using R for that) and train it to recognize some gestures. The engine is being developed in Python and the Wiimote accelerometer readings are being fed by GlovePIE, via OSC.
This is still in early development. I haven't been able (yet) to get good results...