I think the first thing you see when you go to ibtheme.com is the forums. They are heart of this community. They are active and alive. And it makes people think, oh, to "participate I either need to login or register, and then there are other things to explore" like any other forum. But if you go to the root domain from a blind man's eye you cannot see the register link in the top right corner that Pete pointed out to me. What you see (from a user that is not logged in) is front and center "You must be logged in to view this site/content" type of message, nice and big and in the very center of the page, with no easily viewable link to the forums, which I think Pete also had to point out to me. If you have a hard time seeing things and you are a new user, you would thing the site is offline or on lockdown/closed for business. That is what I thought when I came back to the site after several years of being away.
If you decide to leave as is, you would be better served moving the registration link and forums links closer to the front and larger perhaps so they are more discernable and viewable to those of us who are just barely visually impaired (not impaired, but almost, and not glasses wearers, not even after an eye exam). I tried a few different themes as well. I had the same impression. I did of course try my credentials and I was able to get in just fine, so my concerns were somewhat asuaged (sp.?), and finally completely put to rest by Pete when he explained the layout. But I would like to offer the feedback in public as I did in private, though in its proper place. Perhaps it will help you obtain more customers (after the shop is back online) that may get confused on initial arrival at the site and leave under the current layout.