Just saw these guys on a chance viewing of Austin City Limits (I quit watching it a few yrs. ago 'cause I didn;t like the direction it was going). Anyway, this was a great show and I loved what these guys were doing. They really are preserving the culture and roots of traditional Mexican-American music.This is from the website I found:

Los Super Seven is a Mexican-American all-star band whose album offers a magical journey into the roots of Mexican music, gathering together musicians of different generations, genres and styles in a rare and wonderful sense of musical and cultural harmony. It features Tex-Mex music legends: Freddy Fender and Flaco Jimenez, David Hidalgo and Cesar Rosas of Los Lobos, Texas country-rocker Joe Ely, country star Rick Trevi¤o, Tejano music veteran Ruben Ramos, surprise guests like Doug Sahm, and such top Texas musicians as bajo sexto player Max Baca, accordionist Joel Guzman and the mariachi group Campanos de America; it is an experience of rediscovery and renewal for many of the musicians involved.