SPACE ELEVATOR UPDATE: IEEE Spectrum has an interesting article on the subject:

It now costs about US $20 000 per kilogram to put objects into orbit. Contrast that rate with the results of a study I recently performed for NASA, which concluded that a single space elevator could reduce the cost of orbiting payloads to a remarkably low $200 a kilogram and that multiple elevators could ultimately push costs down below $10 a kilogram. With space elevators we could eventually make putting people and cargo into space as cheap, kilogram for kilogram, as airlifting them across the Pacific.

The implications of such a dramatic reduction in the cost of getting to Earth orbit are startling. It’s a good bet that new industries would blossom as the resources of the solar system became accessible as never before. Take solar power: the idea of building giant collectors in orbit to soak up some of the sun’s vast power and beam it back to Earth via microwaves has been around for decades. But the huge size of the collectors has made the idea economically unfeasible with launch technologies based on chemical rockets. With a space elevator’s much cheaper launch costs, however, the economics of space-based solar power start looking good. . . . I have found that the schedule for more elevators, after the first, could be compressed to as little as six months. The first country or consortium to finish an elevator would therefore gain an almost unbeatable head start over any competitors.

Bring it on. And, yes, I’ve been doing more tech-blogging lately. That’s because I’m writing a tech-related book, I guess.

UPDATE: Tim Worstall has thoughts.