MS to dabble in streaming music?

Peter Bale, an MSN executive has been talking to the telegraph about the upcoming additon of a streaming music service to it's array of products. Supposedly similer in nature to that of Spotify, the service is said to be launching very, very soon, and is somehow set to link with both the xBox and the Zune. I can imagine a service allowing you to replace in game music with a streaming radio of your favorite tunes being very, very popular, even if it is ad supported.