Need to research the reputation of some of these places. Found most (if not all) links through tribe.net. ALso I think I'll want to spend a few weeks NOT working/volunteering in some of the countries, so I can really explore..
Global Work book from interaction.org
http://www.mmrfbz.org/ Maya Mountain Research Farm in Toledo Belize
http://www.nepalreliance.org/ Nepal **
One suggestions:"if you don't have teaching credentials do what I do - offer small group lessons of conversation classes out of your home with a book or two. Most Brazilians I have met want English-speaking people to have conversations with. "
Meditation retreat centers in India:
http://www.dhamma.org/ ******came highly recommended