World Map of Social Networks

Interesting stats:

(Click to enlarge – from Infographics)

My comments:
1.        Clearly Facebook is currently dominant, though I’d be interested to see how many accounts LinkedIn has in total.  
2.        Also, sites like Habbo, Mixi and Renren are almost unknown in Western Europe.
3.        I had imagined that Orkut was a failed acquisition by Google, but according to this study, it still has 120m users, mainly in Brazil.
4.        Is Bebo still around?
5.        Even more interesting stats would be ratios of regular users versus registered accounts for each network.