Hello,
i'm new to this site and i'm really glad i found it because i'm really desperate to find a school in Latin America that teaches a full-program MBA all in english....anyone know of any well-respected schools in latin america that teach MBA only in english?!

Well, one thing you could start doing is a bit of research. Check out some of the articles on this site to get started:

MBA programs in Mexico:
http://www.find-mba.com/article/378/mba-programs-in-emerging-markets-mexico

And Brazil:
http://www.find-mba.com/article/362/mba-programs-in-emerging-markets-brazil

And narrow it down a bit, "Latin America" is a pretty wide area.

Is Brazil a good country for Europeans and Americans to get an MBA? I assume it would be a great atmosphere for obtaining an international MBA.

It can be, but like anywhere, it depends on the quality of school. You'd have more luck going to FIA or FGV than one of the less well-known schools.

I hear Brazil is in a good place economically right now, with good growth. It might be a good place to get in on some action.

Knowing Portuguese would be helpful though.

You might want to check out the Global EMBA program. While ESADE is in Spain, not latin America, one of the residencies takes place in Brazil and Argentina. It is a program with a global scope to international business education.

http://www.globalexecmba.com/index.html