Fragmentation is definitely bad. Keeping a regional organizing principle on ENWorld is certainly the way to go, so long as there's a place here to continue to do it.
I can only speak for myself when I say that in the past I've only come here primarily to reach out to local gamers since I am not a huge d20/OGL/D&D fan, and whether it's deserved or not, ENWorld does have the reputation of catering primarily to that group. I am happy that I am finding otherwise, however, so I'll certainly be around more than I was before.
But yeah, it would be good to have a static site to keep announcements running -- some file storage would be good too, for flyers, game prep PDFs, other stuff as needed.
--tom