Hi John

OK here is the file for you to have a look at to see if it is suitable.

There is a README.txt file included that gives a bit of detail on how it works.
Note that it can only be used to sync to existing positions and organisations, the
hierarchies themselves must already exist.

The plugin is accessed through the interface via Courses > Enrollments > External Database (Position Assignments).

Edit: I've updated this post with the correct version of the file
Edit 2: I've updated the file again, with a new version that fixes a couple of bugs (19/04/11)
Edit 3: And another version, which fixes some MSSQL specific issues (20/04/11)

Craig