What makes social networks take off

People; the customers are what make social networks take off. People who want to connect with people and people who want to find new friends are what help Facebook and MySpace excel. These cites allow for people to keep up with friends, birthdays and special events that may be going on. You can even tell your friends what are you are doing second by second on cites like Twitter. People are always thursting for knowledge even if that knowledge is about other people or people they don't even know. Knowledge about everything is at our fingertips more so now than ever before and we can constantly keep with up with people in a real life up to date time. I'm not so sure that I want people knowing what I am doing at every second of the day?