Coming down the pipe from XKCD is this utterly brilliant map of the state of social networking today. Click the link for the giant one. “Communities rise and fall, and total membership numbers are no longer a good measure of a community’s current size and health,” explains the map. A talking map. “This updated map uses size to represent total social activity in a community – that is, how much talking, playing, sharing, or other socializing happens there.” Honestly, there’s nothing to say that the map can’t say for itself. “[the map] involved a great deal of guesswork, statistical inference, random…