What if social networking is like instant messaging? After many years, the proprietary instant messaging services have not been replaced with an open alternative. Open does not always win.
The fact that the proprietary protocols haven't been replaced by more open alternatives is largely irrelevant where the end-user is concerned. As long as the protocols have been reverse-engineered to the point where cross-platform tools are possible, it doesn't matter (to the user) whether the underlying protocols are open or closed. There are now a plethora of instant messenger clients that allow for a single sign o…
When I mentioned IM, I was referring to the fact that service to service communication is closed. With the exception of the XMPP network and some one-off deals between some of the big services, services to not communicate with each other. There is not a single federated instant messaging network.
There is a single federated network for email. I can send a message from my account on Hotmail to Gmail without having an account on Gmail. Imagine what the world would be like if we couldn't do that. We would all have accounts on several services, each with their own inbox. It would suck.