BBC (http://www.bbc.co.uk/news/technology-21522713) says they will launch in "Brazil, Colombia, Hungary, Mexico, Montenegro, Poland, Serbia, Spain and Venezuela". All middle income countries, with the exception of Spain.
During the Q&A, Gary Kovacs (CEO, Mozilla Corp.) mentioned that a USA release would probably happen around 2014, given that the initial launch is designed to deliver "mid to mid-high smartphone capabilities at mid to mid-high feature phone costs."
