Unfortunately I wasn't able to find it when I was posting, otherwise I would have. It was really cool. Difficult to search for and I can't recall exactly where it was any more.

I don't have time to dig right now but you might want to have a look here; http://www.cogs.susx.ac.uk/users/adrianth/ade.html

I know he's had some interesting results. Here's a good write-up I found with a bit more searching; http://www.damninteresting.com/on-the-origin-of-circuits/