It looks good, though I personally would have hoped you'd work to imitate the Zune/Xbox aesthetic as much as possible as you did with your tantalizing Xbox Music 3.0 concepts that you shared with us. Still functionality is more important than style, and if you keep pursuing some of those abilities mentioned, I'll definitely be following it myself.
(Also, that typeface is a little hard on the eyes, but maybe I just have bad taste!)