Thanks for the link -- I just had it up on my desktop and I was up at the counter talking to a student about pinhole cameras -- I am lending him a 4x5 back off a busted Tacharaha and we were working on ideas to build a cardboard front onto it for pinholes. He mentioned he also was taking ceramics, so it was fun to show him the ceramic pinholes!
Steve Irvin gave a class to create ceramic pinhole cameras at the Edina Art Center during the "I think, therefore, I Pinhole" League of Upper Midwest Pinholers group show (2/25 - 3/26/2009)