The AAA rates were released, I believe, in August.
When I called in early Sept. for my '05 reservations (split stay, YC/CR, near memorial day), the CM said they weren't released yet, to try back in December, and that the number of rooms with a AAA rate were unlimited. I knew that was wrong.
A few days later I called back and was able to get the AAA rate for the last 5 days (after Memorial Day, at CR) but not for the first 5 days (YC, Memorial Day weekend). When I called a few weeks later to book Thanksgiving Week '05 at AKL, the CM initially told me that AAA rates weren't out, I asked her to check anyway, she did, and I got them. I asked her to check for YC my first 5 days...unavailable.
From all that I have determined that AAA rates are sold out for the time I am at YC. But I will call every so often, in hopes of a cancellation.