I started to write this somewhat wonky piece for this blog, and realized that I had a column due at MMORPG. That happens to me a lot, lately. I got the kernel of the piece - that bit of research - from my friend and former minion Jeremy, who also wrote a blog post about it.
The article ended up being a little different from my intended writeup, because the audience there is more general than the seven of you, who read, presumably, because you care about community stuff.