Have any of you read "Don't sleep, there are snakes" or anything else by Daniel Everett about the Pirahã language? It's caused a bit of a fuss in the linguistics community, challenging some of Chomsky's rules of Universal Grammar, according to Everett.
Here's a video of a Pirahã man speaking the language.
http://www.youtube.com/watch?v=SHv3-U9VPAs