Appropriate technology villages?

Can anyone add to our page on appropriate technology villages? There must be examples out there. (If our wiki isn’t friendly enough for you yet, then feel free to leave a comment here.)

My trip to Latin America is drawing near, so I’m personally very interested in examples in Latin America, that would welcome a traveler for a short visit. Heck, if they have broadband, and some need that I can help out with, then a long visit might even be on the cards.

*or eco-villages that care about affordability and usability (because an affordable and usable sustainable technology is most of the way to qualifying as an appropriate technology).