I have already booked for Jan '09 (did so using my travel agent) but the rates are not guaranteed as they are not yet released. I am pretty sure they will come out in August, at which time my reservation will need to be be "adjusted" for price (surely it will go up ).
I just did a search and found several threads mentioning "499 days out" and this is room-only not for a package. Hopefully someone else will come along and address that part of your question.
Yeah we're doing Disneyland next week for 3 nights. That's what is good about Disneyland. You can go for a few days in order to get your Disney fix between much larger WDW vacations.