Lester Brown -- "Europe is leading the world into the age of wind energy":

"When the wind industry first began to develop in California in the early 1980s, wind-generated electricity cost 38¢ per kilowatt-hour. Since then it has dropped to 4¢ or below in prime wind sites. And some long-term supply contracts have been signed for 3¢ per kilowatt-hour. EWEA projects that by 2020 many wind farms will be generating electricity at 2¢ per kilowatt-hour, making it cheaper than all other sources of electricity.

"Once we get cheap electricity from wind, we have the option of electrolyzing water to produce hydrogen, which provides a way of both storing and efficiently transporting wind energy. At night when the demand for electricity drops, the hydrogen generators can be turned on to build up reserves."

A couple months old, but good reading.
(thanks, Amanda!)