JAVOedge MiMo Case for Barnes & Nobles Nook (Teal) (First Generation)
This was purchased as a gift.  The cover is well designed, a great fit and looks good as well.  It gives the Nook a good feel and more comfortable to hold and read than bare.  The Nook slides into the cover and does not rely on plastic straps etc. that would stretch with time.  We are very satisfied with it.  I'm going to get one for myself.