Ed's got me beat. I'm 56. Age does make a big difference. I once read about aspies and hfa that we learn to socialize like one learns to type. We learn what we are supposed to do, and, with practice, it seems to become natural. But, it never really is, and we make lots of mistakes.
At my age, I have a good and fulfilling job, a successful marriage to an nt, two sons with autism, and a biography of being bullied from grammar school through high school, being clumsy beyond belief, never feeling like I fit in, even among those who call me their friend (I often still feel this way today), and often acting inappropriately in public circumstances.
Where I am now, however, is different from where I was then. The "mature" forum is often grossly sexual and is not the only thing we have to discuss. I wouldn't mind a forum that addresses the needs of aspie adults who, perhaps, have achieved some success but share a lot of issues.
One major issue would be the notion of "coming out" to friends or in the work place. There is some discussion of this here. Most of us, past a certain age, are undiagnosed and will remain so. But issues around public exposure include being viewed as less competent, both professionally, and, even as competent parents. These are vital issues to adutls of some years.