(according to Wikipedia):
David Hidalgo - vocals, electric and acoustic guitars, 6-string bass, tiple, accordion, bajo sexto, violine, Hawaiian steel, koto guitar, drums, percussion
Cesar Rosas - vocals, electric and acoustic guitars, bajo-sexto, huanpanguera
Louie Pérez, Jr. - drums, percussion, guitars, jarana, hidalguer
Conrad Lozano - vocals, fender precision and 5-string bass, guitarron, upright bass
Steve Berlin - tenor, baritone and soprano saxophones, organ, clavinet, percussion
Jerry Marotta - drums
Danny Timms - organ, wurlitzer, piano
Alex Acuña - percussion, shekere, hand drums
John Hiatt - vocals
Jim Keltner - drums, percussion
Levon Helm - vocals, mandolin
Mitchell Froom - harmonium