I am empowering Burger King’s pernicious viral marketing campaign, which I linked to below, even further by quoting this blog from Kottke.org, in which Jason Kottke uses the mathematics behind the campaign to come up with a valuation for Facebook that is lower than the valuation Microsoft used when they invested in the company. (Getting people like me to blog about a fast food product seems to have been the whole point of the campaign.) You see, if each Whopper costs $2.40, and there are 150 million users on Facebook, but some of them live overseas and are ineligible… well, just head over there for the details.