John Battelle pointed me to an excellent post by David Recordon from SixApart. He talks about the possible privacy and security issues in sharing information on the Internet. He argues rightly that your Social Graph (your list of friends and connections) belongs to you, not to others. Read it and look at the examples he provides. It gives you a nice idea about the possibilities to start getting aback control of your privacy, without losing the opportunites to connect to your friends in social networks. Excellent work. If this really takes of it will have great implications on existing social networks, but even more, on the behavior of the users in those networks.