Mark Zuckerberg announced in a short and sweet post today that Facebook is now home to one billion digital denizens. I’m not going to focus on the impact this news will have on its stock. Instead, I would like to focus on how this significant milestone aligns with his vision, a vision that was clearly communicated in the company’s S-1. After re-reading Zuckerberg’s letter to investors, here are a few themes that resonate with me in light of this news……