Last time I called MS, I asked about the 10 day cruise. The CM thought they would be offering it on points, but did not know when they would be out. That said, my gut feeling is that it will not be available on points. Christmas cruises are never sold at a discount and DCL feels that they do no need to offer any incentives to people including DVC.
We're booked for the Christmas 2004 cruise, and I have heard that it is about 75% sold. My quote from DCL for Category 6 (balcony) with two adults and a 13 y.o. was $8400. Sorry, can't remember the breakdown on that. Diana