I keep forgetting to post this but check out the performance my brother David gave the other week.  He's been into live sampling and on-the-fly manipulation for the past few years, and found out he could use the microphone on his Mac's webcam as input and manipulate the feedback. As an added bonus, he could simultaneously freak out the audience with his massive face projected on the wall.

He recently was promoted to Editor of the long running Canadian music magazine Musicworks.  Congratz, bruddah!