FYI, according to the Chipotle Ingredient Statement, it seems like Chorizo is now compliant, in addition to the Carnitas (and the salsas, guac and lettuce, of course)! I double-checked with my local Chipotle, and they don't use Rice Bran Oil to cook them, either. (She actually said Barbacoa was good, too, which is contrary to the website. I'll skip it just to be safe...)
Sadly, they're still using Rice Bran Oil in the veggies. Ugh . I've never asked for raw veggies (like some folks on here have suggested), but I'll definitely try it next time I'm in.