In Oct. of '04 the BDP, (or was it BPD?) code came out. It's arrival date was known here on the DIS boards and on MouseSavers. I called on the morning it was activated and switched my Pop Cent. ressie for 1/1 - 1/9 2005 for $79 plu tax to AllStar Mo at $55 +. Moderates were also offered but only waterview rooms were left and they were more than I wanted to pay. I ended up getting 3 days at Swan, 2 at AllStar and 3 at Dolphin, the S/D rooms coming on the Teacher's Discount so in the end we only got 2 nights at $55. The short answer is to check MouseSavers and this forum daily and you'll probably know in advance of new codes, or, worst case, within a day.
Bill From PA