Ever wonder about the size of the blogosphere? Are bloggers just talking to themselves? Matthew Hurst of Data Mining put together various maps of the blogosphere. This one shows the blogosphere as a social network. It appeared on Discover magazine's website in April 2007.
As expected the most populous site is the bold white spot marked with the number "1" and represents the political world.
The outlyers represent LiveJournal social networking sites (3), sports blogs (5), and pornography sites (6).
Other maps can be seen at Matt's blog, Data Mining: Mapping the Blogosphere.