I hear Publix supermarket cakes are fantastic, but I've never had a chance to try one. The Disney resorts and restaurants will make them for you - check out this thread on the Restaurants Board:
As a Floridian I know first hand about Publx bakeries! They are fantastic and really yummy! I use them for all my kids birthdays... Nemo was last years cake!
I had one of those Publix cakes for my 24th bd.. yum like you would not believe! There's one right on SR 535. Take SR 536 to the SR 535 intersection, drive about 2 miles, look for Kyng's Heath Rd on your left. Turn left (obvious huh?) You're there!