Jeff, if it takes off, be prepared to moderate it heavily, as you know the real kooks will come out of the woodwork in due time.
One cool thing you may not have noticed is that you can create your own groups. Essentially you can start a group that you think should exist (like Edged Weapons if you are an expert , keep them in the survival/preparedness genre) and then you can be the default moderator for it. Please don't just start stupid groups for no real reason. I'm taking this new web site seriously and I want you to as well.
Damnit Jeff the only thing I am an expert in is trading guns lol So I guess a gun trader group is out of the question