According to one of the articles below, "Chavez" filming in Los Angeles will only take a week. I guess Diego will take a long and well deserved vacation with his family after that.
Primero Noticias, a mexican news show, broadcast an interview with Diego, Pablo Cruz and some of the actors today. There are also some behind the scenes moments. One of them shows Michael Peña dressed as Cesar Chavez giving a speech.
I finally found two new pictures of Diego in Sonora. One with his family at a convenience store and one crossing a street in Cananea, where "Chavez" filming is taking place these days. I also found a new article with two pictures of Diego at the movie set.
UPDATE: June 19th, 2012
I've just found this pic of Diego playing golf with Michael Peña last Sunday in Puerto Peñasco, Sonora:
Here is another favorite Diego video of mine. He did a commercial for MoviStar mobile phones in Mexico. If I had to guess, I'd say this was probably 2004.