I wonder, if we were to think of (realize) human minds as nodes of a supercomputer, connected via wires and human "biology" (data to screen to eyeballs to cpu (brain), cpu to fingers to keyboard to central controller), and designed a system to optimize away the obvious efficiencies, what could mankind be capable of?
If we could wire in all the nodes from HN, SSC, LW, IDW, [insert communities/professions of your choice], and then pointed this "thing" at the problems we have on this planet, what might be the result?
But first, I wonder if you have to believe it's possible, if that makes any sense. I have a strange feeling that might be the hardest part.
EDIT: assume this is workable. What should be the first two problems to address?