It is the Disney Dining Experience card, DDE for short. Here is info:
DISNEY DINING EXPERIENCE:
Become a member in the Disney Dining Experience program for $50.00, a $25.00 savings off of the regular price.
The Disney Dining Experience gives you:
20% off of food and beverages at over 70 Disney Resort hotel and Theme Park RESTAURANTS. (Discount is good for up to 10 guests.)
Theme Park and Resort parking for dining purposes
Member-Only invitations to exclusive events
Annual Passholders can join up by calling 407-566-5858 (Mon-Fri, 9:00am to 6
m EST). The Disney Dining Experience is not accepted during holidays, including New Year's Eve, New Year's Day, Easter, Mother's Day, July 4, Thanksgiving, Christmas Eve and Christmas Day. Please allow 2 to 3 weeks for processing.
And a list of restaurants is here:
DDE Restaurants
Note that as of Feb 1, 2006, Cinderella's Royal Table is no longer included.