Don't get me wrong, the idea of an open-source, decentralised social network is compelling. But it's come too late in the evolution of social networking, and, to be frank, the idea of hosting your own social network only appeals to geeks like me. Let's be clear: there is no space for another network between Facebook and LinkedIn, as the founders seem to think. There are already too many networks and services fighting for our attention. (Am I really going to log in to yet another social network to upload the photos I don't want to share on Facebook?) And this fancy new architecture simply doesn't matter to most people.