1. … if you take Wikipedia as a kind of unit, all of Wikipedia, the whole project—every page, every edit, every talk page, every line of code, in every language that Wikipedia exists in—that represents something like the cumulation of 100 million hours of human thought.
    …
    in the U.S., we spend 100 million hours every weekend, just watching the ads.

    — Clay Shirky: http://www.herecomeseverybody.org/2008/04/looking-for-the-mouse.html