Oh goodness, David... you're in paradise. Zone 10 beats the living daylights out of the rest of the country. You go from about 20-30 possible types of
fruit... to thousands. I have a tiny food forest system started down in Ft. Lauderdale and a much bigger one up here in N/C Florida.
Forget Jerusalem artichokes... for roots you want cassava, sweet potato (
perennial non-stop producer down there), true yams, malanga, taro (as previously mentioned), ginger, boniato... lots and lots of good growers. And as John Eliot said, the Oriental market is a great place to find stuff. Potatoes aren't the best for down south, though you can still grow them in winter.
On the Walmart "elephant ears," however, in my research it seems some of those are not as good for eating. The family is big and poorly named. Some roots are great and require minimal processing... others are borderline inedible. The malanga roots in the market are going to be good ones, so I just generally stick with those. John - did you manage to find Latin names on yours?
Okay: for tasty fruit species, again, forget blueberries and northern stuff. Go for "surinam cherry" (improved cultivars taste better), jabuticaba, Simpson stopper, pineapples, acerola cherry, bananas, papaya, pitaya cactus, grumichama, mulberry, Japanese persimmon, chocolate pudding fruit, tamarind... holy cow, there are so many delicious things to eat...
Here's the collection of posts on my project (with lots of photos):
http://www.floridasurvivalgardening.com/p/the-great-south-florida-food-forest.html
If I lived down there I'd have a lot more done, but it's still turned into an amazing system without much intervention from me, thanks to my dad living down there and staying on top of it.
Depending on where you live, I may be able to hook you up with some cuttings and roots. I'm about to post another set of photos from the project.
I can tell you this: if you push onwards like you are now, your setup is going to be amazing in a shorter period of time than most of us can dream of. Even here we get 4 months of potential frosts... without that, tropical stuff will overwhelm you with abundance. Good luck.