Anyone know of a way I can hook my Sonos system up to the Apple TV via ATV? I’ve move my music library onto the Apple TV and would simply like to stream it to the rest of the house via the Sonos without having to have yet another mac running… ideas? thanks.
I have the same issue as you. have you found a solution? i have not 
Unfortunately even with aTV Flash installed the AppleTV will not be able to stream media to other devices.