Do you have a Disney Visa? I found this offer. (according to mousesavers this is the only offer for that time - so far)
Disney Rewards Visa Winter Discount
Disney Rewards Visa cardholders can take advantage of a 40% discount at Walt Disney World Moderate, Deluxe and Deluxe Villa resorts. Valid most nights: 1/1/10-2/11/10. Some resorts will NOT be available for all dates. Use code OIZ.
To calculate the rates, take 40% off regular “Rack” rates. Your stay will be priced on a day-by-day basis, so rates may be higher or not available on weekends.
You must book by 11/30/09. For phone bookings, you pay a deposit of one night’s room rate plus tax. No change or cancellation fee will be charged if you make your modification more than 5 days before arrival