I have talked and demonstrated using polymer clay as an inlay material in the past. I received this picture from Walter the other night and he used the technique to inlay the dragon box pattern I posted a couple days ago.
I think it adds a great deal of value to the box. Walter did a great job and I know this hand made box will be treasured by someone for years to come.
If you are interested in using this inlay technique the following video from earlier this year will give you the details you need to make beautiful inlay projects.