On the Disney Visa website, there is a new code out that runs through August 24th (or somewhere there abouts). It's only good for the moderate resorts and the Animal Kingdom Lodge. It saved me about $150 on a three night stay at the Port Orleans French Quarter.
I believe the code is ZXGQ. They will ask you for the first six digits of your Disney Visa card when you call to book, so be sure to have it handy.
Karen