Facebook announced that it had hit a billion active accounts Thursday; an extraordinary milestone, celebrated with a rather odd ad. But that number, like that ad, is a sideshow. Another extraordinary stat got overlooked, and this is one that really gives you the scale of what the social network is building. Or to put it another way: one billion isn’t cool. You know what’s cool? 140.3 billion.140.3 billion is the total friendships on Facebook. If you keep track of one thing about the company, make it this, not the user number or fluctuating stock price. Read the full story at Mashable.