[quote=Nightrunner]
What exactly are the various differences in rank? I think the term moderator seems close enough to the basic position of AGM. Though the powers, jobs, and functions of the GMs aren't actually too defined either.
[/quote]

 I think the big difference between an AGM and moderator is a lot of pull. They don't have to wait for a GM to show up to enact their perspective, they can make decisions based on the game as the GM trusts them to make decisions on CS's and so forth whilst a moderator still has a sort of uncertainty when they speak about CS acceptance. AGM's also have de-facto GM authority when the GM is absent. There's a few other things in non-ultimate games, but the thing here is weight.