Corridos have long been a part of the folk music of the American Southwest, Texas to California. Now they are spreading throughout the U. S. and into British Columbia. A small sample:
http://www.nytimes.com/packages/html/us/20070701_CORRIDOS_FEATURE/blocker.html?th&emc=th#
Corridos

Hope that works. If not, try the New York Times online, Friday, July 6, 2007; Audio Slide Show, Corridos North of the Border.

Also look for the new cd of American corridos by Jose F. Garcia.