I still think we don't have the technology and cooperation to get anything of this size and importance work. Once we do, though, we'll have to take advantage of it and hook it up to a ring of solar energy stations in orbit to supply us with unlimited energy.
I can se how this thing would stay up, but no one has explained how you keep it in a configuration normal to the surface. Wouldn't a ride to the top cause the elevator to drag behind rotation or lose some orbit? When you let go at the desired orbit, would you get a string like oscilation or a P-wave along the axis?
A space elevator was a big part of the Mars trilogy (Red Mars, Blue Mars, Green Mars) by Kim Stanley Robinson. Amazing to see people working on this but I don't see it happening in my lifetime.