Technically, the idea that Randall Munroe (author of XKCD, one of the funniest and definitely the geekiest of the comics on the web) had wasn't really about MMOs, but I think there is an application to the communities that we're all gaming in. His problem was that, whenever a community reaches a certain number of people, connections weaken, and it becomes an ever-increasing struggle of signal versus noise. And while his interest in that problem has to do with the IRC channel associated with the comic, it will surely sound familiar to those of us who've spent any amount of time in an online gaming environment.
So what's his plan to fix things? His theory is that a lack of meaningful communication is directly tied to the originality of the statements contained therein-- ie. get rid of the Chuck Norris comments and the older-than-dirt memes and jokes, and you'll have meaningful communication. So he created a script to sit in the channel (#xkcd-signal on irc.foonetic.net) with logs of the past two years of chatting, and if you say anything that's already been said, you'll get muted.