Quite impressive, you can simply demonstrate the gestures you want the Nintendo Wiimote to recognize.
I wonder if it uses a simple linear classifier? I also wonder what their threshold value is for recognizing gestures, since it seems to be able to classify things as unknown gestures. Lastly, how good is the performance? The program seemed to have a slight lag in recognizing gestures, but the Nintendo sports game I tried out seems to respond quite well.