Try Interlinerates.com. I have booked discounted rooms from them and they are still showing 30% DW resort rooms (I think I got 40% off when I booked in 2011). It looks like it ends in June, buy you may want to ask them what they have heard. Perx is also showing the same promotion, but Interlinerrates was better to deal with when I used them the last time and seemed to specialize in Disney.

Good luck! I am interested to hear what they say as well.