You can greatly exceed the $1 per watt price of new wind power systems by building your own homebrew wind turbine generator. [Update: I really meant that you can get the same value for a fraction of the price, but you probably understood that anyway. Typical small scale retail systems are more like $4 per watt.]
“Step by step how to make your own wind generator using basic hand tools.”
My only quibble is that PVC pipe should be avoided. Excerpt from the Greenpeace toxics PVC database:
“PVC was completely avoided in the Sydney 2000 Olympic stadium seating and plumbing. The multi-use arena had no PVC in the seating, cabling, floor coverings, wall finishes or plumbing. If it can be done at the Olympics, it can be done anywhere!”
See the Sam Suds video at YouTube if the Flash version isn’t playable on your system.