I agree, it was an idea ahead of it's time that if caught on, would have completely changed the concept of social networks. It was a big bet and high risk so I'm not surprised it hasn't caught on. The concepts and thinking behind the idea, in my opinion, was rock solid and more true to how real networks work. I might have even have tried to redefine it as the "experience network" where you can look at shared experiences from many different viewpoints.