According to a post by Darkbeer on our Discussion Boards…
Starting this week, Disneyland once again offers the Pay for Disneyland, get DCA for FREE! 2fer ticket offer. You need to live in the proper Southern California or Baja California, Mexico zip codes to take advantage of the offer. The deal lets you get one day at both Disneyland and DCA on DIFFERENT days for the price of a Single day/Single Park ticket. (Currently $72 for adults, and $62 for kids 3 through 9). Tickets will be available online at Disneyland.com, the Main Ticket Booths at the Main Entrance Plaza and other selected locations, including most SoCal Grocery Stores. Also, the Cleaver Brothers Ticket Outlets located at the Anaheim GardenWalk and the Ramada Maingate. If you order online, your Credit Card Billing Address must have a proper SoCal/BajaCal zip code.