http://www.turtletuffshelters.com/
Incredible geodesic shelter structures in two sizes with a bunch of options, $3'400 fully spec'd, but it's an impressive space.
http://tropical-treehouse.com/page1.html
A bamboo hooch treehouse created and built by Jo Scheer. Props Jananda.
http://www.earthlodgeguatemala.com/
An eco lodge and avocado farm built and run by a Canadian American couple outside of Antigua.
http://www.pachamama.com/
A place in Costa Rica that I came across through Ruben from Belgium in Mazunte, Oaxaca, Mexico.
http://www.backwoodssolar.com/catalog/hydropower.htm
Useful info on micro hydro including a chart showing head and flow to output power. Very handy.
http://www.karmawish.com/
Exchange of services in a hospex type fashion. Credits are counted and exchanged for "wishes".
http://www.findhorn.org/index.php?tz=240
Apparently semi-communal eco-village type community in Scotland. Worth researching.
http://www.microhydropower.net/
Lots of info on micro hydro including a book on creating your own systems.
http://www.hedonisiahawaii.com/
Work exchange 2.5 hours or pay $35 - $40 a day. Eco-hostel, solar showers, outdoor toilets, the whole nine yards. :-)
http://the-hub.net/
The hub is a cross between a members club, an incubator, a serviced office, and a few other collaboration methods. Hat tip guaka.
http://africanlanguages.com/swahili/
Swahili to English / English to Swahili dictionary. Translates individual words, useful for creating names. :-)