I apologize if this has been covered, but for anyone who hasn't checked this out yet..http://www.gdradio.net/
It is free!
You can download Winamp on their website, and use it from that point on to access the radio station. If you have a smart phone, you could probably access this website on the phone and use an aux cable to play it through your car stereo, which could eliminate your sirius bill or something... I like to hook my laptop up to my loop pedal with an aux cable and each song that comes up, ill sample an entire chord progression in the song and its saved on there and loops so you can play along and practice following the melody.
Again, sorry if I this is old news..