I tried Pork on a Fork at the ASU Tempe farmers market. Beef brisket and pulled pork sandwiches were sold there in a small tent.
My sandwich (brisket) was very tasty, albeit a little plain (just meat and bread). There were three great BBQ sauces available - sweet/mild, tart, and spicy. I used a lot of all three, but spicy was the best. I felt like I could drink those sauces!
At $6-8, the sandwiches are a little pricey, but they are filling and taste excellent. It would be nice if they came with some corn, beans, or the like to round out the meal.