Here is info from Mousesavers.com:
Use Code BDP and get special discounted rates at select Walt Disney World resorts for check-ins 1/2/05-4/16/05. Discounts will be extremely limited or nonexistent for check-ins 1/14/05-1/16/05, 2/3/05-2/5/05, 2/10/05-2/12/05, 3/11/04-3/13/05 and 3/17/05-3/19/05.
Rates will vary by season. Some sample rates:
Value Resorts (All Stars and Pop Century) - $55 standard, Value season; $79 standard, Peak season; $89 preferred, Peak season
...and if you are an annual passholder or get one before you check-in, you can use Code EWV for $49 room rate at the Value Resorts.
Call 1-407-WDISNEY for your reservation and tell the Cast Memeber you want to use Code BDP or EWV, when you first start inquiring about room availablility.
Cathy