If you haven't seen it yet, Wordle is a program lets you throw a bunch of text into their site's engine, and it turns it into a cool-looking word cloud. It gives greater prominence to words used more often, and you can personalize the shape, color, and style however you want.
You can also just type in a site's web address and have it do all the work for you.
Turned out to be a little bit too close to the Grammys post, so I went back through it by hand. Came out pretty good, I think.
I did some of your sites, too. Here's Assistant Village Idiot:
Random Neural Firings:
And Wyman Family History: