multi-source synchronized multi-room audio (Score 1)

Since it hasn't been mentioned yet, take a loook at http://www.control4.com/. It doesn't ship for a couple of months but it works well in my beta home. I have the option of playing from multiple sources simultaneously streamed over 802.11g or Ethernet and can synchronize to any stream playing from a source in any room. General pricing is $1600 for the server (media controller) and $700 for each wireless 4" touch panel client. It is standards-based but proprietary, and "yes", I work for the company. Other competitve options are Yamaha, Sonos, and NetStreams.