Resources
These are some useful free websites relative to windfarms.
American Clean Power Association (ACP)
National Renewable Energy Laboratory (NREL)
Energy Efficiency & Renewable Energy (EERE)
Canadian Wind Energy Association (CanWEA)
South By Southwest Eco (SXSW Eco)
Wind Turbine Database Viewer (USGS)
Open Energy Information - Map of Windfarms
Distributed Wind Policy Comparison Tool (DOE)
Map of Current U.S. Wind (very interesting)
Map of Current Wind (with Wind Speed)
Wind Turbine Shadow Calculator (Danish Wind Industry Association)
Tallest Wind Turbine in the U.S. installed at West Texas A&M University
For those of you that really want to dive deep into wind turbine layout:
Realistic wind farm design layout optimization with different wind turbines types