Pandora.com offers a great way to listen to music on-line. Basically, you type in a band or a song that you like, and it creates a radio station for you that will play songs in its database that are similar to the one you've created. Its a great way to find out about new artists you have never heard of but just might really like based upon other songs you already like. After listening to a podcast with the founder of this project, I have discovered that it will work much more accurately if you create a station based upon a song, rather than an artist,. Basically, this is because they have a horde of musicians that disect a song into around 42 different Genomes (categories - this service is based upon the Music Genome Project). They then match songs by the genomes similar to your taste and send them to your player. If you chose just an artist like Vanilla Ice, then it would match the genomes of all his music and you'd end up getting a hodge podge of cheesy early 90s rap mixed with his new heavy metal stuff. Maybe you'd want that, maybe you not, but it gives you the basic idea of Pandora. Finally, I'm sure some people may comment about another similar site called last.fm. I do have an account with them, but find that Pandora serves my needs just fine. As a side note there is a mashup out there "PandoraFM" that will store your musical listening habits from Pandora back into your last.fm account.