The American Wind Energy Association:  AWEA is the trade group that represents the wind energy industry. 
http://www.awea.org/

List of wind projects in the United States, both existing and under construction. 
http://www.awea.org/projects/

Wind resource maps:  These should be used only as a reference, and the wind should be measured professionally at your location prior to putting up turbines.  Generally, utility-scale wind requires Class 4 wind or greater, but Class 3 wind resources sometimes can be used, especially if 80 or 100 meter hub height turbines are deployed.  Wind resources of less than Class 3 may be eligible for small residential turbines. 
http://www.windpoweringamerica.gov/wind_maps.asp 
http://navigator.awstruewind.com/

Information about purchasing, installing, and owning small wind turbines: 
http://www.awea.org/smallwind/

Database of state and national incentives for renewable energy, including incentives for small wind and information about net metering (selling excess power back to electric utilities). 
http://www.dsireusa.org/

State energy profiles:  Detailed information about how each state generates, delivers, and uses electricity. 
http://tonto.eia.doe.gov/state/

U.S. Department of Energy’s Tribal Energy Program: 
http://apps1.eere.energy.gov/tribalenergy/