I know they released that code for Disney Visa to the public and I saved almost $300 on our trip November 24-28th at Port Orleans Riverside. I would call and ask. Code is ZBG and you need to book by September 30th and travel between October-December. The small print at the bottom of the flyer says **Offer available most nights 10/1/06-11/18/06, 11/24/06-12/1/06 and 12/9/06-12/23/06. Hope that helps.
It looks like you would have to start the Saturday before thanksgiving, 11/18. Since Thanksgiving is the 23rd which is not a day the discount is offered or the days preceding. good luck.