11:38 UTC+01 - This is either the most useless, or most useful, piece of javascript I've ever written - it calculates the surface area of a pizza, and determine whether you'd get more 'pizza per penny' when buying a 15" 'no crust' versus, or a 12" buy-one-get-one-free deal.
http://www.bluedust.dontexist.com/pizza/