http://www.pandora.com/
I haven't used it for a while, but it's awesome. Type in an artist or song you like and it'll find more for you based on the style of music. Last time I checked, you got 10 free hours until you had to buy a membership. I doubt they could track that though. It also lets you skip songs you don't like. The music is completely under your control.
Edit: it just made me register. You can choose to pay monthly ($3-4) or use it free, but with ads. Oh well. Still better than AM/FM.
I haven't used it for a while, but it's awesome. Type in an artist or song you like and it'll find more for you based on the style of music. Last time I checked, you got 10 free hours until you had to buy a membership. I doubt they could track that though. It also lets you skip songs you don't like. The music is completely under your control.
Edit: it just made me register. You can choose to pay monthly ($3-4) or use it free, but with ads. Oh well. Still better than AM/FM.