Hi fellas. I too, have not really left OFP. In fact several OFP players got together last year and created a clan TEAM ELITE FORCES. It is much more than a clan tho. It is a place that all OFP players who enjoy a friendly, mature coop environment can come. All we ask is that you use a legit copy of OFP (patched to 1.96 RES). Enough blatant advertising.
Interestingly, in general, we see a resurgence from quite a few players who either miss that OFP feeling or are not completely satisfied with ArmA at its current stage. In any case, it's good to see addons and missions still trickling through to the OFP community.
OFPEC seems to be going strong too. I for one, used to sit in the computer lab between college classes researching scripting and mission-making. Thems were the days. Good to see the community going well.