When we went last May, it was not included in the dining plan and we had to pay OOP. I'm next to positive that this is still the case. Hope that helps.
When we went in 98 it was included, but I think that was because we were on some premium plan and had no restrictions, our plan even included drinks, beer and wine. Boy those were the days. Now we are going with the basic dining plan.
As everyone said, on the basic plan it is not included.
It *IS* on the Premium plan (and Platinum) though (beer, wine, etc... are not included on any plan that I know of anymore). I know when we went last summer, when I told the waitress we were on the Premium plan she asked to see my room key before we even ordered. I know it was to make sure we weren't confused as to which plan we were on.
However, those are much more inclusive plans, not just for the food.