Here's a link to a cache of NPR interviews with Brad Lancaster ,Tuscon's rainwater harvesting, plant growing superstar. Tuscon Man Harvests Rainwater (Morning Edition Sept 17, 2008) and Harvesting Rainwater by Not Letting it Go (Morning edition January 10 2008).
Brad is famous for capturing and using 180,000 gallons of rainwater on a small urban lot in Tuscon, Arizona where an average of 12 inches of rain falls each year.
By the way, Brad said in a recent talk in Austin that we are very lucky to have so much rain in our area. If we just use it we can make a beautiful environment without using our aquifer for landscaping. He considers us to be water rich!
Thanks to Joe Barfield for passing these interviews along.