I have some pics from my last trip of edible plants of the Philippines. I was thinking the same thing for a food forest. Banana trees are the most obvious. I hear they are tastier when grown in sub tropical climes. http://www.dpi.qld.gov.au/26_16680.htm
Palm trees are the second most popular. Then mangoes(a nice shady tree for the patio), papaya, apples, oranges, etc, Go to your local fruit market and see what you find the most tasty.
If there is any interest I will dig them up. I found that if you have a machete in the Philippines you never need go hungry.