I don't know the answers fatboy but I very much care about Spotify. I am a premium Spotify user and I absolutely love it. I want to stream Spotify over my home wifi and via the air hot spot when I am on the go. I have downloaded thousands of songs off Spotify and want to stream them to the Air when I am offline.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated