EXPAT INTERVIEWS is an informative site of just that. You can read interviews from people from all over the world who talk about why, where, how they went to other countries to live. It's interesting that there is no apparent advertising, as these types of sites normally do.
Lots of us bloggers from Argentina are represented: Alan, Deby, Coog, Maya, Laura, Matt, Robert, and Adam. We Buenos Aires expats seem to weigh heavily in the South American section. Interesting.
Here's my interview.