The "Politicosphere"

I've posted before on a map of the Iranian blogosphere. But now I discover, via Matt Yglesias, that PoliticoSphere.net has such a map for the US:



The map represents the "612 most visible and influential websites and blogs." Each node represents a website, and the sizes of nodes are determined by number of inbound links. Colors represent ideological or issues orientation; here's what they mean:

Green - Environment and Energy
Pink - Feminism
Brown - Defense
Orange - Education
Light blue - Health Policy
Peach - International Affairs
Gray - Law
Red - Conservative
Blue - Liberal
Yellow - Infopros (sites like Huffington Post and TPM, as well as mainstream media sites)

At the PoliticoSphere site, you can click on nodes to show the corresponding sites' links to other sites. Unrelatedly, the map seems to be shaped like a hawk in flight or the nation of Kyrgyzstan.