Pickup an Apple AirportExpress and call it a day. The synchronization is perfect!
You interest me stragnely as I’ve just picked up a SoundBridgeRadio. This is pissing me off as I now find it doesn’t have a wired ethernet connection, unlike me SB. And if I want it to sync output with the SB, then the Airport might win on two counts (a) it’ll give me an 802.11g base, I currently only use 802.11a and I bet the Radio doesnt’ support that and (b) the sync thing.
I presume the Airport will want to talk to Itunes running on something? or will it talk to Firefly?