You read that right...1.2 Billion, with "B" as in "buh buh buh"

Interestingly, Facebook's fastest growing area comes from its self-serve ad platform, which launched in August 2007. "We believe it accounted for about half of all ad spending on Facebook," eMarketer senior analyst Debra Aho Williamson said. "It's really become a tremendous business for the company. We didn't account for the size of that business last year in our estimate, but we found that it's become a great tool for direct-marketing advertisers."

Who would have thought, a mere two years ago or so, when people were doubting any dot-com could ever make money, this would be happening?