To date, about half a billion of us have signed up to take a dose (or many) of the social networking obsession that is Facebook. But of course it’s not just reserved to individuals. Even businesses understand how powerful the medium is a marketing and communication tool. But how exactly did Facebook’s meteorical rise take shape? Rather than confuse you with a bunch of boring statistics, the folks at Social.com and Online Schools have put together this infographic that charts the frenzied rise of Facebook.