[curt.clifton]

OO items already have unique identifiers associated with them. I think all of what you want can be done with AppleScript.

What do you see as the interface? I was thinking of a script in OO that would take the selected OO item and create a new OF action (in the OF inbox) that links to the item. From the OF side another script would cause the linked OO outline to open with the linked item selected.