We've come a long way from scripted letters, landline phones, and even email. Today, about five years after the birth of social networks, the way to increasingly stay in touch is through these platforms. One reason social networks are far more popular than email - they constantly remind you of who your friends are and who you should communicate with. Small wonder that social networks draw the biggest addicts online. They're the biggest discovery engine on the Web. Where else, after all, could you discover someone whom you may know, but would never have thought about reaching out to, because of your network of common friends? If Quantcast is accurate, hi5 is doing a much better job creating addicts than ... [ Read more ]