Found these pictures from the workshops of Dan Cormier and Tracy Holmes on the Northwest Polymer Clay Guild site. The guild reports that, "Dan debuted a new system for creating patterns in polymer clay. After four years of experimenting, Dan shared his latest breakthroughs in surface and veneer design. Simple two-toned canes became the source for an endless collection of intricate patterns, all without any cane reduction. We also explored "Mokume Dan-eh."
I found pictures from their 2005 workshop in Gloucester online as well. Dan and Tracy are some of those folks that I have to work hard to find on the web.