The networking concerns (Metcalfe's law and all that) are definitely a problem. I don't think that an autonomous network could start with facebook; it would hav

The networking concerns (Metcalfe's law and all that) are definitely a problem. I don't think that an autonomous network could start with facebook; it would have to build up to that kind of application through iterative development and refinement, accompanying deployment increases. The typical scaling problem, in the end, but not insurmountable, given the demand.