GR: The beloved on-demand music service Rhapsody is now available on the Xbox 360 thanks to the launch of a new app. Not only does this new application boast a sleek UI designed specifically for the platform, it also features both motion and voice support thanks to Kinect integration.
There are a couple of free satellite radio options on Xbox Live as well. I usually have a few people a day listening to one or the other, so there is obviously a market for it.