Hi,
Here is what I know... (I love eggs benedict too...)
Animal Kingdom - Rainforest Cafe - Breakfast
Benedict Bamba - Traditional Eggs Benedict: Toasted English muffin halves, poached eggs, Canadian bacon, topped with Hollandaise sauce. Accompanied by seasoned grilled potatoes and fresh fruit $9.99
Contemporary Resort - Concourse Steakhouse - Breakfast
Eggs Benedict - two poached eggs, Canadian bacon on English muffin, Hollandaise sauce $8.99
-or-
Country Benedict - two poached eggs, grilled sausage patty and freshly baked biscuits, sausage gravy $8.99
Dolphin Resort - Coral Cafe - Breakfast
Eggs Benedict $9.95
(Might be available at the Garden Grove at the Swan too)
Grand Floridian Resort - Grand Floridian Cafe - Breakfast
Eggs Benedict - two poached eggs on a toasted English muffin with Canadian bacon and hollandaise sauce $9.99
Polynesian Resort - Kona Cafe
Eggs Benedict served with oven-roasted potatoes $8.99
Port Orleans Riverside Resort - Boatwright's - Breakfast
Eggs Benedict - two poached eggs, Canadian bacon on toasted English muffin with hollandaise sauce and homestyle potatoes $7.59
I think I have seen it on some of the in room dining menus also.
The only one I have had is the one at Kona and it was pretty good... the country one at the Concourse sounds grossly amazing though!
Have fun...