Here's a very interesting info-graphic from Ignite as sourced from Google Insights that describes the current state of social networks. As you can see, interest in social networking seems to have flattened out somewhat. It's also interesting how many of the most visited networks are not in the US. And finally, I don't think any of the 5 biggest losers are a surprise (especially MySpace), but the winners are (especially the Chinese Weibo).
Read more: http://music3point0.blogspot.com/2011/04/current-state-of-social-networks.html#ixzz1JgbBeHma
Under Creative Commons License: Attribution Non-Commercial Share Alike