Hi Tom...this is really just a crazy quilt with the thin sashing you mentioned between each piece.
If you look carefully, you will see that this one is actually a little more "organized"....in that there are about 4 different patterns used to make all the blocks....but you could make each one different, then then add the wider black sashing.
I like this one a lot too. Please don't forget to show us a picture when you make yours.