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The Skystream system is unique for being the first all-inclusive wind generator with controls and inverter built-in. Produces approximately 400 kWh per month in a 12 mph average wind speed.
They've come down to about $7 to10K fully installed.
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For a home that is fully electric (appliances and heat) that's getting pretty affordable... payoff estimated to be about 5 years and providing that the power company allows Interconnection with the Utility, excess power can actually be sold back to the utility via net metering.I like it all... we have an average wind speed of about 14-15mph in our valley :-)