Oh, I forgot about those two. Mangos are definitely sweet... well, no. You can eat those green, too, and there are a bunch of varieties. But we do get a big sweet kind (and a tiny sweet "honey" mango) here, even in Seattle supermarkets. Like avocados, they ripen better further south.

I don't remember actually eating passionfruit, but we had a vine growing on the border of our backyard. Plus, it's a popular flavor in tea and italian sodas and such.

Have you ever seen tagua? It's a big spiky ball. I don't know if there's anything about it that you can eat, but the nuts are carved as a substitute for ivory.