We used our voucher at Breakfastosauras in the Restaurantosauras (!!) at Animal Kingdom in August 2002 - loads of caracters including Mickey, Minnie, Donald and Goofy etc.
The list of restaurants you could use the voucher that comes with the 10 day pass was:
Character Breakfasts at;
Cape May cafe, Beach Club resort
Chef Mickeys,
1900 park fare, Grand floridian
Ohana
Hollywood and Vine, Disney Studios
Restaurantosaurus, AK
also breakfasts at
AS Movies premier food court
AS Music Intermission food court
AS sport End zone food court
Boma, AKL
The Mara, AKL
Spoodles, Boardwalk
Old POrt Royale, Caribbean Beach resort
Trails End Buffeteria, Fort Wilderness
Concourse Steak House, Contemporary
Gasparilla Grill, Grand Floridian
Grand Floridian Cafe
Olivias, OKW
Captain Cooks Snack, Polynesian
Kona cafe, Poly
Boatwrights Dining Hall, PO
Riverside Mill, PO
Roaring Fork Snacks, Wilderness Lodge
Whispering canyon, WL
Yachtsman Steakhouse, Yacht Club Resort
ABC Commisionary, Disney Studios
Tusker House, AK
Pizzafari, AK