Slacker is a web music service with a portable player. You can build your own custom music stations with it.
I took the latest ON, and plugged all the artists in the rally entertainment article, and created a custom station: Rally Radio.
Click this link, to hear the music of the Mountain Magic!
(My apologies to April Taylor, she was not found in Slacker's library)
Note: I will load this station on to my portable Slacker player via WiFi, so I will have "Rally Music" all the way to the Rally.