Works very well. Good job.

I'd like to see:
Recommended & Neighbour radio stations.
Artist biographies of playing tracks.
Play Artist radio from biography/now playing.
Love/Unlove + Ban buttons for a track.
Now playing and played tracks scrobbling.
Profile screen (for myself and other users potentially) - last played tracks, library etc.
Favourite radio stations.

Extra features:
Integration with Spotify apps and local media (e.g. search for X on Spotify from now playing, Y is in your library play now?), Ability to submit your library to Last.fm

Sent you a PM as I started playing with the API on Harmattan a while ago and may have some code that would help you.

Glad someone else is interested in bringing this to the N9.