nautilus-bzr - did you consider support for moving files?

To enhance nautilus-bzr so that it calls bzr mv when you move a bzr versioned file, seems to be impossible without enhancing the plugin interface of Nautilus.
Is this true (I'm new to bzr and programing Nautilus plugins)?
I'm asking this because I ogle to debug nautilus-bzr that it becomes usable for my teammates. In the case I debug it, I would create a branch here (at launchpad).