Book a package for free dining promo dates (around 8/26-10/3) and the basic dining package is included, free. You have to pay rack rate for your room and no other discounts are applicable. You have to buy a package, which includes at least 1 day of park tix...this can be waived if you have an AP. You have to book your trip by a certain date. There is also a minimum stay required...the wdw site says 5 days.
The basic dining package includes 1 Table service meal, 1 counter service meal and 1 snack per night of your stay.
I think that about covers it.....it is mentioned on the wdw website as well.