My Advice to Social Networking Services
I have now had CEOs of three different social networks send me emails asking me to compare Orkut to their service. I've not had a chance to dig deeply into good answers for each specific one, but I did have some general advice that I wanted to offer given my recent experiences with Orkut.com, and my evaluation and followup on various social networking services in December.
Privacy First, be extremely careful about privacy issues.