In case you missed this in comments, CDM reader Trademark has rigged a quick demo of how scratching with the Nintendo Wii remote might work. To manipulate the audio, he’s using the open source Mac/Linux audio programming environment SuperCollier:

If you think of this as a replacement for vinyl, you’ll naturally be disappointed. (The same is true of those plastic jog wheels.) But, while this lacks the control needed for DJing, what it does demonstrate is the accuracy of the acceleration data from the Wii and other similar accelerometer sensors. In fact, you can think of the scratching as a sonification of that movement. I expect more projects may soon grow out of new ways of assigning sound to gesture in the future — and, as proof of concept, this is impressive. Keep them coming; thanks, Trademark!