You aren't far from chinatown (Belknap) either if you want some good Vietnamese. I also know a great Laotion place disguised as a convienence store/video rental place.
There used to be this little hole-in-the-wall mexican place called El Sombrero just north of 820 off the N Main St/Saginaw Blvd. Exit.
Great food, great price. It's been a few years since I was there (used to work in the old T.E. buildings on Blue Mound Rd.) so I don't know if it still exists.
If we are mentioning hole in the wall Mexican joints, I'll throw in a plug for Los Molcajetes in the Albertson's parking lot at Western Center and Beach. I preferred it over Posada's when I lived up there.
Hell, all I ever ate there was fajitas so I can't speak for everything else. It is also small and hardly ever crowded (which is half the battle for me) and just as close as Posada's.