haha no no, I'll certainly agree with you on most of that ... when it comes to politicrap digg for example is little more than a mirror for that huffington site which is of course very hard left. And I could imagine a perfectly valid argument that some—certainly not all—of the more bleeding-edge sites and tech phenomena are often developed by young, progressive, geographically coastal, left-of-center people, and their respective followings and subcultures may develop from there to some degree.We'll see.
Also, if you don't think that people who hang around IRC/Forums/Digg/Slashdot/etc lean left... well.. okay.
But I think there are also huge droves of prominent right-leaning and hard right sites and blogs as well. I feel it's pretty proportional, though precisely whether it's just as many, or more, or whether there's even a way to measure that, I can't say. But basically, you know, I'll put it this way: everybody poops their fair share, and what we've clogged our beloved Series of Tubes with is fairly reflective of what the population in general "puts out" as far as politics.