The Grand Floridian has a CS place called Gaspiralla Grille (or something like that). When we stayed there a few years ago my sister and I had several lovely lunches at the quick service place. Good food and wonderful atmosphere!
Here is another vote for Gasparilla Grill & Games at the Grand Floridian.
I also can't wait until August 2008 when the Food & Fun Center re-opens as Chef Mickey's Express in the Contemporary at the old Concourse Steakhouse location on the 4th floor.