Current alpha features:
* Playlist resume - if you interrupt a playlist 3278 entries in, you can resume at 3278
* Music diary - track what tunes played when & where ( occasional GPS polling optional )
* Powerful music list filters
* Keep track of recently played items and do not replay them for a while
* Works with Spotify thanks to Spotify API for premium users
* mobile app on iOS and Android
Suggestions beyond this ?