I am growing 9 varieties of tomatoes, 3 different colors of zucchini, Honeynut butternut squash, chinese long beans, yellow pole beans and a couple varieties of eggplant. This is in my home garden. I still have garlic and potatoes that will be harvested in May or June.
The Master gardener demonstration garden where I work will have about 8 different varieties of eggplant, 5 or 6 different peppers, multiple melon varieties, 7 or 8 different basils, asparagus, strawberries, lots of different squash and cucumbers. And probably more that I can't remember right now.