Scribe now supports opening and saving OPML files.
It also supports now "legal style" outlines (1, 1.1, 1.1.1), bullets and audio recording.
The first feature is, from my point of view, the most important.
What is somewhat weird is that you cannot open OPML files from the file menu of Scribe. If you click on an OPML file, you can select Scribe as the application to open it, and even make it the default application for opening OPML. It would be good, if such files could be opened from within Scribe, however.
1. See also the older post on Scribe.