If you are looking to save MAJOR money, Book through Costco. If you are not a member, it's worth the $45 membership fee just to save SEVERAL HUNDRED dollars off the lowest rate you've gotten so far, I gaurantee it. I know alot of people have wondered if Costco books Disney cruises anymore (since they don't show up on the website) but they DO. I myself booked one 2 weeks ago, or so.. I've already received my confirmation in the mail, too, just yesterday.
OH, For example, my cruise is for June 7, 2003. 2 adults and 1 child. Our rate is $3353.31 for a category 9 ...Not bad, ehe?