What Fuzzy said. Oberon's designs are probably the best of the best. I wish I had one.
But, I am using the Alice cover. It's more canvas than "paper" and it is still secure even after me playing with the straps. And it was only 30 bucks
But, B/N did tap into an underused market with the personalization options of the nook. You can get just about anything you want for it, from them, for their price.