Granta 113: The Best Of Young Spanish Language Novelists

Granta #113 features a fair few Latin American - and Argentinian - authors in English...

http://www.granta.com/Magazine/113

Granta 113: The Best Of Young Spanish Language Novelists
Edited by John Freeman
Hardcover, 256 pages

Also featured briefly on NPR:-

http://www.npr.org/2010/12/17/132115006/the-new-literary-stars-of-spain-and-lati...

If you want more specific information on all of the authors, the fantastic blog "Three Percent," which covers all sorts of topics regarding literature in translation, has a ongoing series talking about each of the authors.

Here's the link to all the posts:
http://www.rochester.edu/College/translation/threepercent/?s=tag&t=young-spa...