JAVOedge MiMo Case for Barnes & Nobles Nook (Black) - First Generation
I really like this case!  It covers a lot of the surface of the Nook, which covers a lot of the white color (which I prefer the black look), and at the same time, it's a very secure hold, the Nook is NOT going to pop loose like other cases with just a little loop on each corner.  Also, the magnetic latching system works great because it's integrated into the front cover and the surround of the Nook, so you don't end up with the little flap that other cases have to hold them shut.  Keeps it sleek and clean l