The scale of Facebook is hard to imagine. To say Facebook is like a low-life bar (something one of my correspondents on Twitter said) would be like saying NYC is a low-life bar. Ridiculous. NYC has 8.6 million people. It has art museums, libraries, great restaurants, office buildings, millions of homes and families to go with them. Two baseball stadiums. Two airports. Dozens of schools and universities. It's a big place but Facebook is much much much bigger. Let's say Facebook has a billion users. That means it's 125 times the size of NYC. The people who go to Facebook are not low-lifers, they're your friends and family, colleagues, classmates, people in power, retired people, rich and poor, from every continent. What is happening on Facebook? Does anyone have the slightest idea? Even the Facebook company probably only has a very aggregated view of what goes on there. #