In case anyone's interested, I've posted a short comparison of the Zero Image 2000 and the Eight Banners "Sky" wooden pinhole cameras on my site. Go to www.silverbasedstories.com/pinholes.html to see the article.
Let me say up front I'm in no way associated with either company (other than as a consumer) and am only giving an opinion on two products now available. I realize one company is not happy with the other, but it seems like there will now be a whole new batch of pinhole cameras for those in the market.
Personally, I think both are great products and woth investingating further.
PS - The article is NOT technical. So apologies in advance!