I have something very similar to this for my Kindle 2 that I really like and it is cheaper. Purchased on Amazon.com it is a polycarbonate
Clear mCover
It does have a plastic cover over the screen but it is a loose piece that fits onto the screen, you can either use or remove it. As far as a keyboard cover - no that is not covered - it is open. But what I do is tape a rectangle of flexible plastic (like overhead transparency) over the top of the keyboard area so I can lift it like a trap door when I need to use the keyboard. Works great!
Another advantage of the mCover is that is has a stand on the back so that you can stand it up on your desk like a picture. Handy.