A bit of googling turned up this pricing sheet where Chez Scheme is listed on page 88 (it says $65 per unit or $325 for 10, so buy your Chez's in bulk!):
From whom can you go to buy a copy, and is it still under development?
The web site doesn't look like it's been touched since 2011, and Google searches constrained by site:cisco.com turn up nothing. Other searching showed no signs of life.
http://www.centurylink.com/business/asset/channel/cisco-us-g...