Flightgear has now also a sub-forum on flightsim.com - just like the commercial flightsims. I don't think we'll use it for actual support, but at least I see it as an opportunity to showcase what FG can do, get people curious and answer any questions they may have with regard to the software or the project.
I've started a screenshot thread there where I plan to post impressions from my own flights and coding experiments - it'd be nice to have a few more people look over and join now and then.