It seems to me that a temporarily useful playlist that might be broken later if a server changes is still better than no playlisting at ALL with those UPnP-accessible files. I mean if a server isn't locatable, I'd imagine a playlist entry could just be skipped over.

I'd think it would have to be doable in stages. Stage 1: add the basic piece that lets the UPnP area of the interface add the file references "as is". Stage 2: introduce a more detailed "Playlist editor" (perhaps as an external app) so that playlists could be fixed or edited after the fact, down to the level of editing a server path (or whatever the equivalent is for UPnP--I confess I don't know how UPnP "addresses" things). Stage 3: whatever long term redesign would need to be done to get around the problem totally (if such a thing is even possible). Is some kind of general SAMBA network type browsing for media even possible in Canola, or would it be too slow?