couple of notes...
1) last two times we stayed at POFQ (in Fall 2010, and winter 2011) they did not allow biscuits and gravy as a snack credit, even though the price fell under the $4.00 general rule-of-thumb price. The manager told us that biscuits and gravy was considered a "Plated item, not a snack item" whatever that means (since the cake slices were also "plated items" but they did count as snack credi, and the beignets were also a hot plated item, but they were allowed.) Anyway, don't count on getting biscuits and gravy with your snack credit unless they change back (we had previously been allowed to get biscuits & gravy for snack credit at POFQ in early 2010, and late 2009.)
and
2) people have reported being at Disney when the new dining plan "year" kicks in...was just reading a post about the one drink/two drink change that occurred between 2010 and 2011 plans. Anyway, the person said they were allowed 2 drinks with breakfast on Jan 4, 2011, but on Jan 5, and through the remainder of their vacation, they were only allowed one drink. Even though they had checked in prior to the change. So again, be prepared that your plan may change in the middle of your stay.