It would be really neat to have playlist database support. I'm not saying that OCD has to be able to actually make the m3u file - just that it should support playlists as custom albums.
For instance, how about several blank fields in Track properties to show what playlists a track is in? Also the ability for OCD to show playlists I create as if they were custom albums? And the capacity to mark tracks for inclusion in a new playlist and have them show in the right-hand pane - then to be able to click a button that automatically creates a playlist entry as if it is an album?
I expect it's quite complicated / time-consuming to actually get OCD to make m3u (or whatever) files. But this can be done in WMP or some other favourite app. I would just like CATALOGUE SUPPORT for my playlists!! And, of course, the facility to be able to click a 'play' or 'queue' button for my list, either in Squeezebox or another player.
I currently have a workaround that manages about half of this, but it is a significant hassle to enter the data... and sometimes I forget!
This feature, for me, would really strengthen OCD massively. Am I alone in wanting this? I'm sure I can't be...