This year, for the first time, AP holders can purchase the Disney Dining Experience (DDE) card - previously available only to FL resdients. the cost for AP holders is $50 per year (you will get two cards) and it allows a 20% discount at most WDW restaurants- including alcoholic beverages. DVC members can now get a discount on AP and PAP purchases. Infomation about the DDE is available thru the AP holders site. It is not a DVC program.
There is also a dining package available with certain room packages thru WDTC (CRO). Currently there is nothing similar for room-only reservations (like DVC point stays). Reportedly, DVC is working on some sort of meal plan as an add-on to DVC reservations.