They did: " Keep in mind that the list excludes adult sites, ad networks, domains that don't have publicly visible content or don't load properly, and certain Google sites. "

A curious list of restrictions... I wonder what kind of site would be in the top 1000 that didn't have publicly visible content or load properly? Pure Flash sites, maybe?

Alexa has a top 500 list with google and porn sites included http://www.alexa.com/topsites

Sorry! I must have missed that.