http://www.inhabitat.com/2007/11/26/...urbine-maglev/
There was an article about a year ago on a Japanese researcher who had figured out a way to make a wind turbine with virtually zero friction using magnetic levitation. Apparently, it's now come to fruition.
A maglev wind turbine has actually been created and they've now started building a facility to manufacture them in China.
For comparison, to power approximately 750,000 homes (the amount 1 MagLev turbine can power):
Current Wind Turbines
-----------------------------
* Would require 1500 regular wind turbines
* The turbines would occupy 96,000 acres
MagLev Wind Turbine
------------------------------
* Would require only 1
* Would occupy 100 acres
* Has a claimed 50% decrease in operational cost over the regular turbines
No idea how accurate their numbers are but if it's even 1/10 accurate, this is a HUGE improvement over current wind turbine capacity.