I'm on a lot of social media stuff: Twitter (which I feed directly to Facebook), reddit, Fark, and so on. I get quite a few ideas for blog posts on these sites, and of course get lots of support. I also can simply chatter when I feel like it, making jokes, linking to things I like, and so on.
I find myself spending more time on Google+ lately. I like it better than all the other stream-based media; it gives me more room than Twitter, isn't as all-fire irritating as Facebook, and with some minor exceptions I like the interface. I'll sometimes even drop into the video hangouts, like chat rooms where you can actually see the other folks involved. Speaking of hangouts, you should circle Fraser Cain no matter what anyway. He runs the Live Star Party hangout with live feeds from telescopes around the world, which is awesome.
I post things on G+ I wouldn't put here on the BABlog for a variety of reasons; simple musings, crowd-sourced stuff, ideas dealing more with online life. If you're on G+, here's my page.
Speaking of which, I still have two Facebook pages; my personal one, and my "fan" page (note: due to the limit FB puts on the number of friends a personal page can have, I can no longer accept friend requests there. The fan page has no such limit, however). And I'm still blurting away on Twitter, of course.
I'll note that sometimes, when things get busy and I don't have time to write a full-blown blog post, I'll use these media to link to cool stuff others are doing, too. So I'd recommend following me on these social sites if you want to see things you won't see here on the BA blog.
If you're social, come find me. I'm kinda social too.