The Duiker Research suite of products, including Color Symmetry and the drUtilSuite, and the underlying intellectual property were acquired by Autodesk in January 2012. These products will no longer be developed or supported by Duiker Research.
The drUtilSuite mental ray shaders have been updated to support Maya 2010 and 2011. Maya 2012 support will be coming along shortly.
The main drUtilSuite page has been updated here
The most recent version of the drUtilSuite manual and shaders can be downloaded directly here:
The drUtilSuite for Fusion page has been recreated in our new spiffy format
Let us know how they work out for you