This is pretty cool...
http://www.name-this-tune.com/
a.k.a. "Musipedia" (.org)
It's a music encyclopedia, built on-the-fly by its users, on the Wikipedia model. Uses a clever tune searching method called "Parsons code", where a tune is described only by its changes, up, down, or repeated. Seems to work -- I found "Over the Rainbow" with it. The tune was detail-described by another notation method called "Lilypond", which had the tune, but sans rhythm, so in the spirit of public interest, I figured Lilypond out and went ahead and put some rhythm cues in.
Good fun, and potentially useful someday -- check it out.
P.S. Here's the Parsons Code for "Rainbow", just to get you jump started:
*UDDUUUDUD
