Okay, this could be kinda cool...
"Audio d-touch is a collection of applications for real-time musical composition and performance, with very special user interfaces. The collection includes a drum machine and a sampling sequencer, both are controlled by spatially arranging physical objects on an interactive table surface. Each object represents a sound, and its position with respect to the surface is mapped to certain playback parameters...."
Watch the video. It's kinda like a cheap, DIY set of audiocubes, or some other visual/physical interaction device.
It might be a little unwieldy, but I think it could possibly be used for Live Looping performances, given a little customization. It would probably be excellent for vocal loopers and other performers who have their hands free. Plus, you can probably run a parallel feed off the webcam and give your audience something visual as well.
I know the Max/MSP set will be quick to jump in and point out that this sort of thing has been available with Jitter for a while. I know, I know. But not all of us can program in Max (yet!) and, heck, this is free... ;)
"beyond this window, night is shuddering and the earth grinds to a halt
beyond this window, something unknown is watching you and me...."