There are also some room discount Bouncebacks that have been offered at various times - you have to be a guest at a Disney resort at the time to be able to book and have to book and put a deposit down before checking out.
You never know if one will be offered during your stay or not. You should check here on the DIS right before you leave for your Disney trip to see if there are posts stating there is one going on, or not. Then there should also be a flyer in your resort room, or on the resort TV, telling you about the offer - usually you have to call an extension from your room (lately it has been extension 8844 )
Here is an example of a previous room discount Bounceback offer:
Bounceback Discount Promotion
This offer is available ONLY to guests who are currently staying at one of the official Walt Disney World resorts, and could end at any time.
Using a special phone number provided on a flyer provided in some resort rooms, you can book a room for stays during selected 2008 low season dates (in January, February, March, April, August and September), at a Walt Disney World resort and receive a discount of 20% off rack rates at Value resorts; 30% off rack rates at Moderate and Deluxe resorts; or 40% off rack rates at DVC/Deluxe Villa resorts.
The specific dates reported so far include:
Moderate resorts, 30% off most nights 1/6/08-2/2/08; 2/24/08-3/1/08; 3/30/08-4/21/08; 8/10/08-9/27/08
Deluxe resorts, 30% off most nights 1/6/08-2/2/08; 2/24/08-3/1/08; 3/30/08-4/21/08; 8/10/08-9/27/08
DVC/Deluxe Villa resorts, 40% off for most Sunday-Thursday nights 1/6/08-2/2/08; most nights 2/24/08-2/28/08; 3/30/08-4/21/08; 8/10/08-9/27/08
Reservation for 2008 must be made before you check out to qualify, and there are no exceptions made. A deposit of one night's room and tax is required at time of reservation.