Santiago Benejam Torres converted Axxon’s fan-translation of Little Brother to ePub, and is making it available gratis on his site. Thanks, Santiago!
Update: I’ve just heard from Eduardo Hojman, my editor at Puck, that the Spanish edition of Little Brother will be published on March 7, under the title, “PEQUEÑO HERMANO”! It’ll be distributed worldwide — through Spain and Latin America.