I was at a buddy's house tonight & he picked himself up one of these for Christmas & asked me to help him connect it into his system. Pretty cool piece. We used tosslink to his main reciever & rca's to his 2nd zone reciever at the same time. Setup was pretty simple. I've seen a couple of other references to soundbridge here & there but did not really know what it was. Erik

I think they're a much better option than Apple's Airport stuff, and they even have discrete on and off.

It gets even better. I have a client streaming their Ipod to 3 roku's while the Ipod is plugged into the computer or download the ipod to Itunes and stream it that way.

That's how my bud was gettin' files was from iTunes on his wifes laptop through their wireless hub/router. I'm trying to get up to speed on networking & this is just one more app. Erik

Don't forget the slimdevices squeezebox 3. (finally a good looking version)
If you are looking for integration or customization, their server software is all open source, so you can tweak to your heart's desire.