Pandora

I recently discovered and have been playing with Pandora. Very cool site. When you first come to the site it asks you to enter one musician or song you like into the engine. That will create a music "station". After that Pandora will play songs that are similar to the song you entered. You can add in a variety of artists to one channel like I have the Classical music mix channel for when I work. On it I have Josh Grobin, Yanni, Apocolyptica, Enya and more. It's a great way to hear new artists I've never heard of before.