Readers of Arthur C. Clarke’s Fountains of Paradise or 3001 know of a structure he proposed; essentially a giant ring around the earth connecting multiple space elevators together. Something like this would provide an enormous increase in living space and a save haven for millions in the event of a planetary wide catastrophe.
Paul Lucas discusses this and other megastructures in this very interesting web posting. People who “think big” enough to be comfortable with the idea of a Space Elevator should also be comfortable with other concepts Mr. Lucas discusses.
Nyein has been heard from. Click on the 
In this undated, but, I think, recent, set of 
Over on this Blog’s sidebar, in the Images & Animation section, I’ve posted a video summary of the 2006 Space Elevator Games. It’s the best one I’ve found and I’ve had hopes that it’s producers would put it up on their website, in archives or something. Alas, it has not happened and they have refused to respond to repeated emails on my part.