Gonna have to pop in here and +1 for Demo Admin site too.
I'm trying to ascertain if this software has what I've seen no other have and it's frustrating. I use Teamspeak for chat, and I'm looking for something that has "Teamspeak"-like permissions.
Most all other BB's, or Forum software, for their Admin access has an "All or nothing" type situation.
I'm looking for something with a more granular approach to permissions. Something that allows you to create groups with "weights".
Groups A, B and C.
Group A is set to weight: 50
Group B is set to weight 40
Group C is set to weight 30
Allowing any group to promote people to the weight of 40 and below for Group B means that Group B could promote people from Group C to Group B. But Group B people can't promote folks beyond.
The reason this is needed is from our ranking structure:
(assume the numbers are weights)
Guild Master 
Senior Officer 
Team Leader 
GM's should be able to promote SO/TL/O
SO's should be able to promote folks to TL/O
It's very hard for me to lay out exactly why I'm needing this other than I simply want layered permissions that give some folks access to some abilities based on weights rather than just an "On or Off" switch.
Anyway. tl;dr +1 Admin Demo!