How long till overpopulation?

Took my wife to the doctor for a prenatal checkup today. With a baby on the way it's a good time to think about the increasing population, which I wrote an article on at Associated Content. It's called "How long will there be enough to go around?" Oh, by the way the Lego Man experiment didn't go so well, but the No Shave November page is pulling in a lot of views. More to come.