This has been talked about for many years, and the details have been worked out. The hold up is the cable, and perhaps funding. If it ever was to actually be built it would save so much money in the long run. There are many risks though. Here are several links for those who are interested:
http://en.wikipedia.org/wiki/Space_elevator
http://www.zadar.net/space-elevator/
http://www.liftport.com/
http://www.spaceelevator.com/
http://www.spaceward.org/