WDW has the Military Promotional tickets right now. They are 4 day MYWPH for $138 and they expire Sept. 28, 2011. You can inquire at City Hall, in MK, about about participating in the flag ceremony. Military can purchase tickets through their local MWR/ITT office or SOG to save a little money. Military can also save on resort rates through 10/1/11 (4/17 - 4/20 are blacked out). The discounts rare 30% off Value Resorts, 35% off Moderates (including Fort Wilderness Cabins) and 40% off Deluxe and Deluxe Villa Resorts. This offer can be booked as a room only reservation. And if you want, one of the dining plans (Quick Service, regular or Deluxe) can be added, but then that changes your booking to a package and you are then subject to the package rules. Park tickets can't be added to the packages because this offer is tied in with above mentioned military promotional tickets. When you check-in military ID is required or they can then charge you full rack rate.
I totally missed the "plain old veterans" comment until I read CF's comments. My comments are more for the retired or active, sorry.