Great news, if you have anything to test on n900 just shout... What do you mean with local playback? Files on the n900? Don't need that, I need to play the stuff that's on my NAS (running subsonic). No need for radio streams either, the build-in mediaplayer can handle that too. Thanks for the work!
Yep, really good news. Same for me, I would love to be able to connect to my subsonic server (https if possible, with specific port) and play either single file or a full directory streamed form the server. An important feature for me would be to have an option to select server media re-encoding, as I've ripped my CDs using FLAC and unfortunately my upload bandwidth is a bit limited for streaming FLAC. Anyway, thanks for the work, would be happy to help and test (I'm a Qt developer too, mostly on desktop but have Qt Sdk ready to test on my N9).
artist -> album(optional: Play whole album. Clears Now Playing, and replaces with all tracks in album) -> track -> play track(all tracks in playlist cleared. Replaced with this track to end of album) -> track finishes -> will automatically play next track.
artist -> album (optional: add album to Now Playing) -> track (clicking adds to NowPlaying, and auto plays if nothing present)