I was able to book a 1 BR for Monday thru Thursday for a July 2009 stay at the 7-month mark. I have to say though that my dates were flexible; I had already called a couple of times before looking for dates. Third time was a charm. I called at exactly the second that MS opened. Good luck!!!
BTW--Just a warning! Once you stay there you will want to add on! We added on as soon as we got back home, and we're getting ready to add more points this fall. This gives us the 11-month advantage. I really believe you will fall in love!