Nathan Bransford - The Forums

http://www.coverpop.com/pop/visco/

Here's a cool graphic of several thousand science fiction magazine covers.

Run your mouse/cursor over the covers to see more info and click to see a full cover. The website says the covers are arranged horizontally by time and vertically by color.

Sorry Holly, I can't get the website to work right so I can see the covers. Looks like a cool website, though. I liked the Doctorow quote. :)