Hi Ted,
I played I bit this weekend and I found some kind of work-around to the problem of making a course done with AT available to other AT instances, doesn't work in all scenarios. Let me tell you about that...
1. The Standalone Launcher uses an AT instance that is portable, it's a self-contained package: application + DATA.
2. As you said is true that you cannot import a course (yet), but if you work with the Standalone Launcher you build the course in the "portable space" (C:\adapt\...mongodb data somewhere...)
3. You cannot move the course, but you can move the all AT instance: let's say from PC1 to PC2. This is a valid case if you work without collaborators, and you just need to move your work from a laptop to a desk PC or similar.
Really waiting for the export/import feature! :)