Can a bunch of AppleTVs be used as room or zone audio devices? ie. Put one in each room, connect to an amp and speakers. Then anyone with a macbook or iDevice can stream audio to it? How about if a central iTunes media server was setup using home sharing to macbooks. Can those macbook users then stream audio to a designated AppleTV? i.e. say one machine i setup to receive all iTunes content. Then macbook users share it using home sharing. Can one of those macbook users then stream playback to an AppleTV? Basically, I'm wondering if a multi-zone audio system like Sonos could be achieved using the new AppleTvs. Thanks.