THere’s nothing like a picture to help summarise complex concepts, and since 2007 Randall Monroe has been creating brilliant maps that encapsulate where the growth is in online communities. The picture below says it all. To really enjoy it, browse the full-size version. For the geek, there’s plenty of comedy gold in the map, even though to some extent it’s based on science – as much as you can get any real numbers about online communities.

Enjoy:

(Full-size version here)

via [XKCD]