I had the same thought yesterday when I was browsing through the groups myself. There are several interesting groups, but not a general "pinhole photography & cameras" group. The Zero Image group is "only" focusing on the Zero cameras (also nice).
Shall we start a group on APUG? I'll have to check what the rules & conventions are on APUG, but sounds good to me. I saw that most groups aren't very active, but let's give it a try.
What do you think? If you're willing to post & support as well, I'm willing to check it out at APUG and to start up the group.
Let's find out if we are alone out there, carrying a black box with a hole in it ......
Greetings from Bert from Holland
BTW: nice image. Can't do that over here right now: lots of snow and a freezing wind