Sounds cool although I don't think I'd want people talking to me while I was playing a game, it would throw you right off and you could miss an important cut scene, die or whatever. Plus, whats the point? You might as well just walk over to your PC if you want to use Window Live Messenger. The achievement thing is probably the best update coming out of this. Oh and the marketplace blade...is it that hard to just click "Marketplace" on the Xbox live blade? Not really. The low-power thing whilst downloading sounds pretty cool though.