I am a huge fan of Taqueria De Amigos. It is located just a half mile from the old eCircles offices (next to the San Mateo Marina Grocery), and out of my last 50 lunches at eCircles, I bet I ate 45 of them there. And I still go at least once every time I go back to San Mateo to see my folks. It's just your basic, hole in the wall Taqueria, but it does it right. And the lack of good taquerias is the biggest thing missing from the New York food scene.