Am I missing something here? There is this new post over at Xbox360fanboy.com on how you can stream XM radio to your Xbox 360. I have been doing this for two months using the Media Center’s Online Spotlight feature. Once you connect your Xbox 360 to your Media Center, fire up Media Center from the Xbox 360, and look inside the Online Spotlight area. From there click on “Music & Radio” from there you can see an official XM radio offering that has a slick interface that works pretty well.
Not sure why people think this is new…It’s been there the since launch 😉