I started the Burrito angst thread a couple days ago. Anyhow, I thought i'd add that, while there seems to be NO, and I mean NO real Mexican food around, there ARE quite a few Salvadorans who fake it very nicely. I've had really great tacos, tortas, and pupusas (these are actually native to El Salvador) in the city.
I'll have to try that Pupusa Guanaca place - sounds yummy.
I was surprised to hear that so many people liked Anna's. The highly gentrified locations put me off.