Wanted: a site that recommends music

A site that recommends music based on the name of a song.

[ziggystardust]

Some time ago I stumbled upon a site where you could enter a title and the site would recommend some other music that was "similar" (ie. what they thought I'd like). It used some sort of collaborative filtering (or whatever) to produce these recommendations and I think it was pretty good ;)

Now... the problem... I want to use this site, but unfortunately I can't remember the name or url (and googling doesn't help)... ;) I'm kinda hoping someone can help me out with this. Do you know the site I'm talking about?

Cheers.
//ZS

[lawman]

Music Match does something similar.

[ziggystardust]

Hmmm, not it. But thanks anyway ;)

[bcolflesh]

Looks like some iTunes users are starting something similiar to what you describe:

[music.cs.uiuc.edu...]