This subject has always interested me. I have some land in Central Chile, which regularly gets frosty mornings and rain in the Winter, and hot, dry Summers. Very Mediterranean-type climate. I'm sure there are a bunch of fruiting plants that would do well in that climate and that are not yet in Chile. I'm thinking fruit like Jujubes, Papaya, Mulberry, Achachairu, Mango, even cool variety lychees!
My dream would be to one day retire there, plant a bunch of rare (for the area) fruit trees and set up either a stand at the local Farmer's Market, or a roadside stand.
Jaime