Interconnected nodes has to come to make the whole thing worthwhile.
With just a few guys around the corner from each other connected, it kinda limits what can be done on it, but once the nodes are connected, then it becomes a lot more usefull.
Any why does there need to be a reason. Shouldnt because we can be reason enough?!
I also dont think we should limit ourselves to the realm of wireless, running ethernet to the neighbours is effective and damn cheap.
nodes can be interconnected via tunnels on the internet if national traffic is ever made free on jetstream (Jetstream starter is so slow as to be useless for it)
In any case, the heart of the network lies in the linkups, not the people connecting to the nodes. Once there is something there, they will come