If you want to book now, do it direct with Couples or a good TA for you can rebook.
Couples has been running the best sale in May and June, the one with the resort credits. I do not know if they will offer that this year with all the pain that people have given them, but just in case I would keep your options open for it if it happens.
It looks like you can only book online up until Dec.25, 2011. If you try it says there's no availability, but I really doubt that's the case this early. The rates are only listed until Dec. 25 as well.
I would call Couples directly and speak to someone.