Fun With P2P! All you gotta do is search in any peer-to-peer program for "Mic In Track". You'll probably find a few files named "Mic In Track", followed by number. Download as many as these as possible, because they are files recorded on their home computer by people using Music Match. Who knows what you can find?
Check out The Evolution Control Comittee and Stark Effect for some examples of whats out there, and of what can be done with them.