If I remember correctly Mr Amick's car had an electric motor/generator and storage batteries. In theory running under wind power you could recharge the batteries to some degree. I wouldn't consider this car purely wind powered. I would consider it more of an electric car with wind range extension.
I would also move that this is some what a viable technology and it doesn't belong in the Unicorn Corral.
EDIT: Popular science article :
http://books.google.com/books?id=GgE...%20car&f=false