Florence has reminded me that I forgot about C. Withers! This place is in the restaurant strip on Broadway near 36th, and is relatively new--I think it opened last year. They are really cheap: $5 gets you a sandwich and two sides. I think the smoked cabbage is amazing. The mac and cheese was recommended to me, but it was overcooked and not very flavorful. The burnt ends were good but not amazing--I'll probably try the brisket or something else next time I go back. The $5 special is for lunch and possibly also for dinner (hopefully we'll find out tomorrow when we go back for Mardi Gras dinner).
Edit: The $5 special is Sundays only, and they are only open 12-3pm on Sundays. Still a great special, though. They do have an every-day special of $5 for three smoked wings (although we got four) and two sides, which is also an excellent deal.