RailDriver, honestly man, this is just my opinion so I'm requesting that the other members don't flame me too hard for this but..
I wouldn't get involved with groups like that. I'm not saying that this particular one is "bad" or anything. I think I may have stumbled across their site once or twice in the past, but really man, to me it just seems to be volunteering your personal info into a federal database. (no, I'm not saying that those guys are patsies or anything, but you KNOW they're being monitored)
one of the members here on SP said some very wise words to me a while back. "If they REALLY want me, they can find me... but why help them?"
I personally think Sledge has the right idea when he said that you can just take steps to find folks in your area... and that way, depending on how you go about it, you can maintain better OPSEC.
I fully support established militias so long as their ideology is on the right track. I fully support the idea of Patriots networking on the internet. But I've always been very weary of actually participating in groups like that. Sites like SP are about as far as I'd like to go when it comes to internet networking.
If you DO decide to join that group, or another one like it, I'd suggest that you first get the fuck off of facebook. yea yea, I know that the info on facebook is still stored somewhere, but like I said, why help them?
good luck, and whatever you decide to do, BE CAREFUL, WATCH YOUR BACK, AND COVER YOUR TRACKS. use a proxy server.