Unanswered questions:

- What's the bitrate / sound quality of the tracks that will be available from this service? Better or worse than iTMS? Better or worse than 128kbit MP3?

- How annoying are their client-side tools? Will they even work offline? Will they try to reach deep into your machine to prevent you from extracting the audio?

- How many weeks until some kind of FairPlay gizmo comes out and breaks the whole thing to smitherines?