I received a Disney Visa discount a while ago, but it wasn't a very good deal. I've heard (though this is totally rumor) that they aren't doing any big discounts this fall, because with Cars Land and the new DCA, people are flocking to the parks. It seems like they aren't having any trouble filling rooms. I called a while ago for my dates in October, and all the standard rooms at PPH and DLH were booked. Only concierge and theme-park view rooms were available, and I'm sure those will be filling up soon, too.
I hope you do get a discount! We decided to stay off property (FFI) this trip, so that is always an option as well!