Instagram's 4-person team has announced that the service's users have posted over 150 million photos. Consider that the free, social photo-sharing service now receives about 1.3 million photos per day -- that's 15 shots per second -- and you realize one thing: people really like sharing photos. Make that process easy and convenient, as Instagram has with its iPhone app, and you've got yourself a winner.
Kevin Systrom, one of the company's founders,
