Nice diagram. A bit reminiscent of the game "Illuminati" published by Steve Jackson.

I think a website that generated the diagram dynamically from information that people could update and vote upon would be interesting. Let users claim affiliation to (or knowledge of) specific group, and vote on the percentage that group is influenced by different memes that other groups lay claim to having promoted.

I'd like to see a version with memes added about attitudes towards privacy, the role of government, and the nature of reality verus fantasy, and groups added that include not just burning man, but also gaming, science fiction and academia (the universities in the Bay Area had a strong influence). See perhaps where Anonymous, flash mobs, etc fit in. Also perhaps some art movements (eg the way Dadaism had an effect upon the sureal and the anarchistic). Again, a dynamic version would let people add what they think was influential, and then voting would pare it down to what others agree actually did influence things.