The Sunday brunch buffet at the Grand Hyatt Tampa Bay is amazing. They just retooled it a few weeks ago and its now upstairs at Armanis. Its around $60 and includes all-your-can-drink champagne and champagne cocktails (very decent stuff on offer too) and a gorgeous selection of food.
Most everything is portioned out in two/three bite presentations - starts with room filled with antipasto bar, caviar, sushi, various cerviches, salmon presentations, huge cheese selection (15+ varieties), breads, warm appetizers, fruits, veggies, raw bar (large shrimp, king crab legs, crab claws, clams, mussels), etc.
Then its "menu" service - they bring you two hot entrees at a time - they recommend you try them all (or as many as you can stomach) - they are also 3 to 4 bite portions and some great stuff (banana pancakes with caramelized walnuts, mini waffles, short ribs, fish dishes, etc.).
Then you move on to the dessert bar - again small two to three bite portions plus truffles plus a white chocolate fountain.
Totally enjoyable, not crowded, piano player, great view of the bay. Amazing value for the price... plus they do limited seatings so you aren't rushed at all.