since I'm already in the thread, I'll go ahead and respond to you, Master Gracey...
a bounceback is a discounted reservation that you can only make during your Disney vacation while staying on property.
You may get a flyer in your resort room, or an email sent to you during your trip, that says ... "book your next vacation before you check out and save 30% on your resort room".... or something to that effect. There are usually certain dates that are available for the offer, with other dates blocked out.
My experience has been that the discounts are similar to AP discounts, or even some general public discounts, but they are for dates further in the future than most AP and GP discounts, so you can plan a little earlier. For instance, while on our March trip, we booked a bounceback trip for Sept. at 45% off a DVC villa. I don't think the regular discounts for Sept. came out until early this summer, so it was just a chance to book a trip and have a wider selection of rooms/resorts to choose from.
Hope that helps.
EDIT: oh wow, we're all here at once! hahaha.