It's going to be very difficult to provide the same things Facebook does in a decentralized way (I've thought about the problems around such a project a lot and

It's going to be very difficult to provide the same things Facebook does in a decentralized way (I've thought about the problems around such a project a lot and written up my ideas for an approach in a series of blog posts at http://carcaddar.blogspot.com/search/label/ClearSky http://carcaddar.blogspot.com/search/label/ClearSky - I've outlined the big problems and proposed workable solutions for all of them, but the implementation is difficult and will be hard to get right). Justin Frankel released WASTE in 2003 and it does the basic P2P friendnet thing, but without a great user interface, ability to log in via the web browser from any random Internet cafe/computer lab, and a load of luck ("traction"), it's not going to work.