Every now and then I come across something that hits just the right combination of silliness and coolness. This project from Western Australian hackerspace "Artifactory" is one of them! They've combined a bunch of Jacob's ladders, a MIDI keyboard, and a Freetronics TwentyTen to create a real "mad scientist" musical instrument. Check out the video to see the result.
More details at http://wiki.artifactory.org.au/doku.php?id=projects:musicalcoildriver