Depending on your situation these guys have been in the winmill areation for years.
http://www.koenderswindmills.com/Koenders_Windmills_FreeAir.html
Also for electric generation I have some friends that swear by the low air (3mph) flow windmill Missouri Wind and Solar units. [url=www.mwands.com/ ]www.mwands.com/ [/url]