Has anyone ever heard of any? Searches with the words go, goban, board, game and papercraft in all sorts of combinations didn't bring up anything. I can't believe it doesn't exist though. I'd make my own, but since I suck at photoshop and pepakura, I want to make sure first, that my effort is not pointless.
Er, all you have to do is make blocks, give a pretty design, and fold.
what else do you need besides simple stones and square goban?
You could use the small origami stars in different colors for stones.How-to: http://www.youtube.com/watch?v=hFy7vKf0LbA