Cucamelon - tiny little watermelon-type fruit that taste like cucumbers and lime. Definitely going to hunt these down and put some in my garden.
HOW TO: HAVE A GRAPE ARBOR. If I can grow grapes, so can can you. I'm not talking vineyards here, actually not even enough to make your own wine (at least I don't think so, I've never tried), just a pretty little arbor to enjoy the fruit from, make some jelly if you like, and enjoy looking at all year long.
How To Care for Fruit Trees - Better Homes and Gardens
Plant Tree Grafting Propagation Methods
Graft your own designer fruit trees By Jackie Clay - This is a great article about grafting. If you are interested in grafting but think it seems too hard you might want to take a look at this article. She breaks it down quite nicely into what is grafting, rootstock, and everything in-between.