If you like Mexican food, you must eat here. For $2, you get doubled up corn tortillas filled with any meat you want (they usually have 5 or 6 choices). The you can go to the topping bar and pick from an assortment of salsas.
I really can't say enough about how amazing this place is. If you live in Oakland, you have no excuse not to walk over for some tacos! (or glass bottle sodas inside!)