This Internet thing is definitely going to take off. Consider the passing of a truly remarkable milestone. On a single day, more than a billion people used Facebook. Yes, one in seven people on Earth used Facebook on Monday (and that photo you thought was so awesome got 4 Likes). This marks an incredible moment for social media’s most dominant brand — and maybe for the evolution of human behavior. But the fact that we have a site that can take that kind of user load is also the systems administration feat of a generation. To put Facebook’s technical achievement into perspective, imagine your grandmother calling you for tech support. Now imagine a billion of her.