We have reservations at floridays so I was just looking at googlemaps to find out the same thing! I found there is a Super
WalMart about 4 miles away. Also a Super Target that is 4 miles away but it's in the other direction, you have to cross I-4, doesn't look as easy to get to. You didn't ask about restaurants but just in case, there are a few places right around the corner - like 0.2 miles - Outback. Subway, and Maggie Moo's Ice Cream (never been there but that sounds fun!!).
Other restaurants I looked up (sorry it's just chains, I have to know where all familiar chains are due to food allergy issues in our family!!):
Applebee's - 4 miles
Friday's - 1.3 miles
Chick Fil A - 1.8 miles
Hope some of that helps you out a bit. I would love to hear your review of Floridays when you get back and any helpful hints as far as what building to request.