Three sides of the "inbuilt" cover for the 900 is unprotected too.It is integral, though, and the front of the cover is stiff and closes with magnets.
Iintend to carry it (the 650) around with me in a bag constantly too, but until my "tuff-luv" arrives, I use rubberbands and a thin piece of plywood cut to size. I'm sure that if I continue to use the plywood, it will scuff the buttons and the edges where the reader touches the plywood. Unfortunately, it appears that it will take a while, as Amazon.de quotes an estimated arrival time of December 17th - January 5th.
