I check in to various boards that I come across in my net surfing, but other than here (and occasionally but not often, Fathom) there aren’t any message boards I touch bases with elsewhere. It’s just such a hassle to try and keep up with so many and find yourself repeating the same things over & over again, so I try not to even go looking elsewhere, for fear I will get hooked.
I used to play on IRC in a Trivia channel, devotedly, for over a year until recently I hit some obstacles getting onto IRC via work, where I have a computer.
Other than that, there is one community of women with whom I have been in regular contact with for well over a year now. It’s an email list of childfree women called “Pride & Joy”. It’s a great list, diverse, spicy, caring, inflammatory, encouraging - all at the same time. If I had to choose between that list and any other online human contact, I’d stick with that list.