Pop may pull up with some availability. But probably not at the price with the pin code.
I think generally the values sell out the fastest. It could be what availability there was for Pop for your travel range was limited and got booked up fast.
I rec'd a pin code e-mail today too for Christmas week. Mine specifically reads, "Get 30% off Disney Deluxe Resorts for stays most nights Dec. 25, 2009 through Jan. 2, 2010."
Also it states, "Ask about other Disney Resort categories that may be available when you call!"
From this I am guessing there may be some availability. But much more limited.
Does your e-mail read the same?