If you are staying onsite, do not have a car, and are on the
Disney Dining Plan, these are your other options:
Cantina de San Angel
Hacienda de San Angel (these will open September 2010 but are owned and operated by the same company as San Angel Inn)
Maya Grill, Coronado Springs and Pepper Market, Coronado Springs (these have only a few limited Mexican-style entrees. Stick with the counter service if you want typical Tex-Mex fare like burritos - not traditional Mexican like San Angel serves)
Refreshment Port near Canada at Epcot (this actually has more South American style entrees)
El Pirata y El Perico at MK (if it's open - lately it has been open for lunch)
ESPN Club has nachos and Big River Grill has a chicken quesadilla appetizer. Both are at the Boardwalk.
Paradiso 37 at DTD is not on the dining plan.
That's about it. Not much to choose from.