This map is extremely interesting:

Last year I created a network map of political books based on purchase patterns from major web book retailers. The network revealed a divided populace… at least amongst book readers. I was curious to see what, if anything, had changed in the patterns in 2004….

[via Esther Dyson]

[To the tune of Nusrat Fateh Ali Khan, “Shamas-Ud-Doha, Badar-Ud-Doja,” from the album Shahen-Shah.]