Wind turbines produce energy by harnessing the wind, and usually they look like windmills. But a new breed of airborne wind turbine is heading into production. Many of them are house-sized and blimp-shaped, inflated with helium and left to churn in the rapid winds that are always blowing 1000 feet off the ground. Others are shaped more like helicopters or ladders. Still others cling to bridges. Someday I totally want one of these floating over my house, powering my Mac while I blog. Check out our gallery of gorgeous, airborne wind turbines.