To answer elaineteresa - We cruised last September and really enjoyed it. I originally booked for last September (and for Sept 2008) because of the prices. But I would also choose Sept over Jan and Dec because of the weather. I like my water warm, I don't think I could handle the water temps in the winter (even if it is the Caribbean). The only reasons that I would cruise in Dec would be for the holiday decorations and the price (which would be pretty good reasons and I may just do that this Dec

).
We went to St. John in December 2005 and had great warm weather. The water was warm too. The pool at the house was freezing though.
This DD in December was not very good weather at all - disappointing - we could not really enjoy the decks, pool etc. For a cruise, we spent too much time indoors, in my mind. I hope Sept. will be different even with the hurricane possibility. The ship is beautiful in December with the holiday decorations and the characters dressed in holiday garb. We got lots of nice pics but it was expensive to not be able to enjoy the weather. Maybe a short December cruise is the answer.