Seems odd to me not to announce this during the actual product reveal, but it's good to hear in any case. Rumor from windows fanboy #1 (Paul Thurott) is that Microsoft is working with a third party to make it happen for now. Sounds similar to the old iPod on Windows solution where Apple licensed MusicMatch. I wonder if they are doing that to test the waters before having the internal Microsoft Mac team devote time to it.