Surprise, surprise -- the App Store's reached yet another wild milestone, hitting a whopping two billion downloads since its inception a little over a year ago. It took a little under three months to get from one billion to 1.5 billion downloads and a hair over two months to get from 1.5 to two, so the pace is accelerating just a bit -- a function both of total iPhones / iPod touches in circulation and of the ever-increasing size of the App Store's catalog, which now stands at over 85,000. The most interesting stat here might be the fact that there are actually more than 125,000 developers enrolled in Apple's iPhone dev program, meaning there are at least 40,000 devs out there who need to feel the crack of the whip (or, like some of us, just want access to beta firmware).