Awakenedsoul and I started a conversation in a different thread that I thought was cool, but way off topic there. I copied the beginnings here hoping some others have experience with developing a permaculture that they might share.
Interesting idea about pruning the full size fruit trees. Some of the dwarf trees seem to do pretty well around here, but I will definitely check out Dave Wilson's site. The USDA bumped us up two zones recently, but we're still a long way from tropical. I'll trade you apples and walnuts for guava and lychee!
When I was a kid our garden was about an acre, maybe a little more. Space wasn't an issue. We almost never had to weed because my Dad was a firm believer in DEEP mulch. Once everything got going he would spread a layer of compost then a good 6" of straw. It worked great. The straw blocked the sunlight to the soil, kept it cooler and drastically slowed evaporation in addition to stunting any weeds that were trying to get started. At the end of the year the straw just becomes that much more organic matter for the soil. It does take more nitrogen to break down straw so it helps to rotate legumes or some other nitrogen fixing crop around the garden from season to season.