Check out the World Clock, created by a poodwaddle, a customizable search engine home page type deal. The World Clock includes stats based on figures from the WHO, CIA Factbook, World Census Bureau, and more. Click YR, MTH, WK, DAY to show growth from that time period. Click NOW to see the growth since clicking.
Also view the Food Clock. Pretty amazing, although “due to the contradictory and dynamic nature of much of the data,” they may not be accurate.