It's basically Last.fm, but with a few more features and better integration with iTunes. It's not an Apple product, and currently works with Windows Media Player as well. (Hopefully they'll add Winamp before it gets out of beta.)
The big-upped feature is the ability to download mp3s from "similar" artists, for free, from garageband.com. And of course to recommend similar artists to you from its own currently limited database. I'm also optimistic that in the future they will include other free mp3 sites. For now I'm sure they're letting the bands tag their own songs with "similar" artists, because some of the free mp3s I've downloaded have had nothing whatsoever to do with the artist I was listening to. That's gonna happen.
And also, it's a social-style site, like last.fm, that matches you with people of similar music tastes and lets you IM them.
― Charlie Brown (kenan), Sunday, 21 January 2007 19:30 (eighteen years ago)