In researching this concept I came across this one that apparently was in a quilt show. Isn't that quilt STUNNING?!?! I found this thread on The Quilting Board which I THINK is the beginning of the same quilt. And that's how I figured out how to do this:
So it started out with a sketch from the link above to build the pattern. I stuck some Steam a Seam onto the scraps of fabric and then traced the pattern. The cool thing about Steam a Seam is it's sticky, so you don't have to iron it until you are ready to permanently set it. So you can play around with the layout until you are happy and then blast it with the iron.
And twelve hours of quilting later...