Email and the Friendster Network

Over the last few days I've actually been using Friendster as a replacement for email for some of my friends. And its really nice. No idea if its sustainable, it requires people to check Friendster rather frequently to work. But in our increasingly spam filled world it makes a lot of sense. What better way to filter out spam, but to create a network where only your friends and friends of friends exist? My email filters create some of that functionality, making it easier to sort friend from spam. But I still get the crap. In Friendster I can be reasonably assured that no one is pushing breast implants on me. And if they did I could immediately identify their connection to me and let their friends know about the misbehavior. In other words the system is set up for social self regulation. Now if only that functionality was built into my mail client...