I took a look at this. All they talk about is underlying technologies. Even when asked about features, they could only reply in technology. The only participants they want are extreme geeks. If someone wants to replace Facebook and its millions of regular people, it’sgoing to have to be easy and transparent to the user, and free. I could totally see a product that provides all the social interaction any social app does, unobtrusively ad supported, kind of like Google used to be. Still make a lot of money without devouring the privacy of it’s members. And for $5 per month add a few premium features and an ad free experience. Guarantee that privacy will never be changed for existing features without express consent of the users and people will poor over (all the while reporting on the privacy crimes Facebook commits on a daily basis.)