For those of you out there who have the occasion to stream music on your computer check out www.pandora.com. You can create up to 100 radio stations for free. Each station is based off of an artist or album you enter. For example, I have three stations right now; NIN, Pink Floyd and Hum.
From their website...
Q: What is Pandora?
Pandora is a music discovery service designed to help you find and enjoy music that you'll love. It's powered by the Music Genome Project, the most comprehensive analysis of music ever undertaken. Just tell us one of your favorite songs or artists and we'll launch a streaming station to explore that part of the music universe.
Q: How do you decide what to play?
We take your input (artists, songs) and feedback ("I like this", "I don't like this") and use the Music Genome Project to create stations that play songs that are musically similar to what you've told us. That's it; only the music counts. We don't care how popular the artist is, who's backing them, and we don't care which genre bin they usually belong in. Only the music matters.