Here's some information about xeriscape and water wise gardening.
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• Principles of Xeriscaping, City of Lakewood
http://www.ci.lakewood.co.us/comres/page.cfm?ID=327&PrinciplesofXeriscaping/.hrml
• Xeriscape Colorado
http://coloradowaterwise.org//index.php?option=com_content&task=view&id=88&Itemid=21.html
FACT SHEETS FROM CSU EXTENSION
• Xeriscaping: Creative Landscaping
http://www.ext.colostate.edu/PUBS/garden/07228.html
• Xeriscaping: Ground Cover Plants
http://www.ext.colostate.edu/pubs/Garden/07230.html
• Xeriscaping: Retrofit your Yard
http://www.ext.colostate.edu/PUBS/garden/07234.html