I'm going to get a bunch of them and just run Shairport with a home made amplifier daughterboard to drive ceiling mounted speakers. Not sure if synchronised playback is important for me yet.

I also decided to hold off buying more than one for now (despite being given the opportunity) to give people further down the list a chance to get one without waiting even longer. Once I can just order them from stock from Farnell then I'll order more.