Google have now made that little removable strip along the rear of the Nexus 10 usable by releasing a flip cover for the 10-inch slate. The Nexus 10 Cover is now available from the Google Play Store.
It's available in two colors, scarlet or dark gray, and folds over to protect the screen on your Nexus 10, as well as putting your tablet to sleep when it is closed. The Play Store states that the cover will ship in three to five days, and it's priced at $30. Not bad at all to protect your precious tablet.
You can get it right now from the Play Store.