Jango.com is free and legal Internet radio that plays music you like and it couldn’t be easier. Acording to Jango:
Just type in an artist – and your first station starts playing right away. You’ll get the music you want, along with similar favorites of Jango users who share your taste. Customizing your stations further is just as easy. Just add more artists and rate songs that you want to play more or less. You can also tune in to other people’s stations – and they can tune in to yours! In your player, you’ll see who’s listening to the same music as you, who’s listening to your stations, and what your friends are playing.