CrowdVine is a lot like Ning and allows you to roll your own social network. From the looks of the people who have joined to test the Beta Tony Stubblebine must have some solid valley credentials. The problem is that the power of a network increases with its size, possibly even proportional to the square of its size. So CrowdVine’s offering undermines the core power of the network by making it niche. An application built inside an existing social network like the offerings appearing for the Facebook F8 API is far more appealing.
Having said that, something that none of the networks offer is to allow you to managed multiple networks. So that you could have for example You Friends, Your current Co-Workers, your family. And friends in one network would not necessarily be able to see people in your other networks. A number of people I’ve spoken to say they avoid adding people to social networks because they have different groups of friends that ‘don’t mix’.