I know BT is not a great Audiophile option but it can be convenient for Add Hock access from 3rd party phones etc. Occasionally someone will want to play something to the Air from their Phone, and as my Airs are on the main Home Network (without Guest Access) this is not possible. At present I can add a BT --> Analog adapter to the Analog input on the Air just fine.

But it is a bit clunky with cables and dongles sticking out. Given we have a bunch of unused USB Ports, would it be possible to add a Bluetooth USB Receiver directly to the Air?

HT:M80,VP150,QS8,EP500 Outside:4xM3 Office:AudioBytes, Rumpus: M60,VP150,M22 Portable:2 x Airs