Could Sonos let us know where they are on allowing some form of playlist editing? Following the merger between Napster & Rhapsody (or vice versa) I have playlists filled with "track unavailable" debris items (eg 365 tracks on a 2500+ playlist). Because there is no way of sorting them (eg on a PC Controller), even when I note that a track is not available, there is no way for me to sort the playlist eg alphabetically or search the list to nail and boot out the offending item (or even better, allowing me real time to see something similar that is available and do a swap). The lack of any editing playlist capability is, in my view, the Sonos systems weakest (and perhaps only) failing. I note previous comments on backup files: I was not aware of this "new" weakness and it would be a disaster if I lost my playlists (even the ones with Napster debris). Come on Sonos: it cant be that hard to have some playlist editing and playlist backup?