At this point, this is all nothing more than a distant dream for which the majority of the necessary technology doesn't yet exist.
I'll have to disagree with you there Bob. It's not a "dream", it's a project being worked on at Harvard by leading scientists. Last I checked, scientific funding isn't so easy to come by that money is thrown at dreams. They have developed the hardware - ok, maybe they're still refining it - but it's not as if they don't know how to go about it.
What I like is that they have a way of doing it, and it seems that the main thing that prevents it happening faster is the computer technology. But that technology is advancing at an exponential rate, so adequate computing power for the task at hand shouldn't take too long to develop. Still, if they're hoping to get the mouse done in 4 years, that probably means we've got quite a few more years before they finish the human connectome.