I think this has been blown out of proportion a bit. Sure, Microsoft is going to support getting Linux running, but so what. If they support Virtual Server, they have to be able to support everything that can run on it. I don't see what the big deal is other than Linux purests saying "OMG, Micr0$0ft i$ $upp0rting Linux! LOLz0rz! HAHA".
Come on, it's stupid, it's annoying, and no one cares.