Global wind statistic, wind direction and strength analysis: www.windestimator.com

Rebate and incentive look up for US and Canada: www.windknowledge.com

A general zip code, wind resource estimator: www.solar-estimate.org

U.S. Incentive List www.dsireusa.org/

Utility Incentives: www.windpoweringamerica.gov/

Wind Energy Resources Atlas: wrredc.nrel.gov/wind/pubs/atlas/maps.html

Wind Mapper: www.windmapper.com

Wind Ordinances: www.windpoweringamerica.gov/policy/ordinances.asp

National Wind Maps: www.nrel.gov/gis/wind.html

How much electricity do your home electronics use? www.michaelbluejay.com/electricity/howmuch.html

For energy usage, use the Smart Calculator 

The return on investment depends on a few different factors. 
Use the calculator to find out the ROI.