Well, we've currently got a TF2 meet-up... however, I don't see why we can't expand it into a Valve gathering, seeing as if you've gotten into one of their games then you're most likely to know a whole bunch more. No idea for FMA, though. Sorry!
I will see about getting the TF2 meet-up switched to the "Valve meet-up" so that it can include everyone.
Altered the thread. Here you go!