The makers of two up-coming documentaries have put out trailers, both which I found out about via The Good Blood. Both look interesting. The first deals with a group of barely-teens who surf the waters of Rio de Janeiro and the second is about Brazilian music through the eyes of foreigners.
PS. – As a brinde (freebie), here’s another (short doc) I found on The Good Blood, called Temporal: The Art of Stephan Doitschinoff, which is really cool.