I'm bipolar too. The stigma of mental illness is far from gone in my country, but it's slowly but steadily getting weaker. I think that one of the reasons it's getting weaker is that a handful of our celebrities have been completely open about their illness, including our most popular actor. When I've told selected friends and colleagues that I'm bipolar they have been slightly uncomfortable in a couple of cases, but in most cases they have reacted just as if I was talking about diabetes or something along those lines.
For me, the problem is rather that those who know about my illness fail to realise how serious it is, and I know that I'm not alone in this. I suffer from bipolar disorder II, which actually has a higher suicide rate than bipolar disorder I, so I don't get mania. Depression is not as obvious as mania so I evidently don't appear ill. It feels like I'm dying from poisoning, but no one cares because they can't see it. But then again, I've only told a couple of people about my death wish and suicide attempts.
Exactly what kind of support are you looking for? In your country,, which I assume is the USA, there's DBSA for instance. They seem to have support groups all over the country, so maybe there's one in your state? Also, I know there are online forums focusing specifically on bipolar disorder, but I don't know if they're any good.