Well, I hate to say this but Pinhole Visions have closed their door (http://www.pinhole.com/). Pinhole Vision will always be one of the greatest Pinhole website ever. Thanks you, Pinhole Visions, you will be missed.
To bad. I've only tried pinhole photography a few times, but find it fascinating. I do enjoy the pinhole sites and have learned a lot from them. Pinhole.com RIP