Federating Loomio servers
Admins: this may already have been discussed elsewhere, in which case feel free to let me know and delete this thread. I did search though and didn't see anything.
Basic proposal: I want to be able to have an account on one Loomio server, but join a group or subgroup on any Loomio server. I'm not saying Loomio should force everyone to have one identity across the whole Loomio network (like Goog/ FB try to do with their "real names" policy), but that any Loomio account I have should be able to join any group in the Loomio network regardless of what Loomio server hosts that account. This would depend on the group's joining policies/ permission etc of couse.
Admins that want their Loomio servers to be walled gardens (for whatever reason) should have a simple way of turning the federation system off. Maybe it should be built as a module that can be removed entirely? I'm guessing that any inter-operation between servers would create new attack surfaces, so the federation system would need to be carefully designed (maybe using a well-established distributed authentical protocol like OAuth, Mozilla Persona or OpenID?), and some admins might know their members don't need federation, and want to turn it off to eliminate that attack surface completely.