Not really. All I managed today was getting these two rigs to play nice. Very tricky, but manageable. Rigify gets touchy if you don’t rename things before attempting to rig something new. The safest method is to rig in separate .blend files, then append the groups into a management file. On second though, linking is probably a better choice, so you can manage the rigs via their separate files.

All I managed this evening was a pose of these two, though I intend to make something a bit more involved later.