Here is a pretty good short piece on circuit bending filmed by the Oregon Public Broadcasting. It features Billy the Bender explaining what circuit bending is and his thorough collection of circuit bent devices and future candidates. For me this was a little scary to watch because it really goes to show that there are other people out there hoarding this stuff just like me and some people I know! Very well done video however, totally worth the watch!
This video also appeared on Matrixsynth.