Paradiddles and Piledrivers - who would have imagined combining drum fundamentals with a professional wrestling attitude. Check out Worlds Fastest Drummer. The have a championship belt and a special e-meter for measuring drum strokes, plus a Girls of the WFD section. (I found the link at Music Thing where electronic instruments are actually amusing.)
Waltzes and Windows - listen to Fatal Exception - an mp3 of piano parlor music flavored by Microsoft Windows system sounds. Mac users may be clueless. (This was in WFMU's Beware of the Blog. Here's another link to 21 versions of They're Coming to Take Me Away, Ha Ha, a much more appropriate reaction to Windows.)
Asteroids and Art - imagine an old fashion shoot-the-boulders video game combined with a video and music synth. I was bored after not very long - but your mileage may differ. It's called Transcend and the better you do the nicer the music and graphics. Or so it claims.