You guys are already on the most active H2 forum that I've been able to find--and I'm a member of 8 different HUMMER forums.
This is the best group of continuously contributing H2 owners I've met, and also the best place to find deuce parts.
Not to discount any of the other forums by any means, H4O seems to be the most hard core group of HUMMER owners along with CHO. The Canadian guys are very active in their forums, with the Albertans seeming to stand out in doing runs and hanging out. The French Canadians seem to be strong in the H1 crowd and parts dealings.
Unfortunately with the advent of Facebook I think the forums are really going the way of the VHS tape. I don't Facebook, but I know the forum guys are hanging out there alot it seems.
So you've got quite a few choices for HUMMER related talk, but you're already home and don't know it.