So I got an email yesterday from the Jorno people saying that they were canceling work on the new keyboard. And I was thinking I'd just stick with that silicone keyboard I got at Brookstone. But then someone suggested the Mac bluetooth keyboard. It doesn't fold, but it's small and lightweight, and I can borrow one from work. So I just got one, and it works great, which I say with certainty because I'm using it now to write this post on my iPhone. And it fits nicely into my day bag, so I can carry it around with me without any trouble.
So I guess I'll go ahead and return the silicone keyboard to Brookstone.
All's well that ends well!