Hi guys!
In regards to Davids request to be able to duplicate. Since the fieldgroups are basically posts you can actually use this plugin:
http://wordpress.org/plugins/duplicate-post/
I’ve tried it myself on a fieldgroup containing repeaterfields and other fields with success so I think it’d work fine on any fieldgroup.
Perhaps this could be added to the documentation so that everyone and not just ppl finding their way here become aware of this 🙂