You know that there there is a way to import playlists into Songbird, right?
But what about the ability to export playlists from Songbird? That's where the Playlist Export Tool comes in to save the day!!
So far, the only playlist formats that you can export your Songbird playlists as are M3U and PLS.
Support for more formats are coming soon.
The XPI file for the Playlist Export Tool extension can be found here
Changelog for Version 0.1.1.13 is not yet available here, but a partial version can be found here