This is not the style of music most of you expect to hear from
a mechanical musical performance, but I figured I'd share it with you:

  http://www.youtube.com/watch?v=a2SnYa2aJNo 

Yes, there's a modified guitar, drums, tambourines, but there's also
a synthesized keyboard, a synthesized voice and the stepper motor from
two flatbed scanners (the flat things in the video that are, well,
about the size of a flatbed scanner).  You just might not realize what
you're looking at unless you've pulled your scanner apart or watched it
running with the cover open and nothing on the glass.  They're
highlighted in the last 10 seconds of the video.

Bob Fitterman