Some people really want to build a space elevator. Part of me thrills to this idea; another part of me -- having read Kim Stanley Robinson's Mars Trilogy -- is scared by giving the bin Ladens of the world such a tempting target. But that, I suppose, would be a point in favor of building it.
And what a sight that cable would be! I wonder how far away from the Earthbound-terminal one could be and still see the thing. I wonder how much economic activity would spring up around that terminal, wherever it is. I wonder where that terminal would be, in the first place -- someplace with a high level of geological stability, I would assume. That would leave out California. This looks like a job for Nebraska.
(Thanks to Sean for the link.)