Hey Greg, A great start is Gaia's Garden by Toby Hemenway. You can also watch some free videos by Geoff Lawton on youtube or his website. A lot will depend on your location/climate and your goals. If you share that, I'm sure people could help you out even more.
You guys haven't done this much, have ya? I suggest you study this tiny ad:
Green Infrastructure for Irrigators and Stormwater Management Course
