The mode map

While it doesn't quite cover all modes, this map by the cartoonist, Randall Munroe, is a really great way of visualising the different forms of communication available to us in 2010. He's chosen to make the land masses' sizes proportional to their number of users, as this article in The Independent explains.

The full image of the map can be found here. You'll see me bobbing up and down in the Gulf of Lag, just off the south coast of the MMO Isle.