Really nice cover, Katsunami
I ordered
this one, though I`m not sure about it, I might get a hard book cover instead, depends how the ordered one feels in person.
For those that prefer these "hard covers", here`s another nice one --
http://www.amazon.com/gp/product/B009UHC5X4 ($4.95 at the moment) (and it comes in a variety of colors -- Dark Blue, Black, Green, Hot Pink, Light Blue, Light Pink, Orange, Purple, Red, White). From the reviews, though, it looks like the sleep function is not working so well (magnet being to weak or not close enough?).