I had forgotten to post this earlier but it might be a good gift idea for the ebook reader owners in your life. Waterfield Designs sells sleeves for the Kindle and the Sony Reader. The "SleeveCase" offers a rear pocket and protective flap with an impact resistant plastic.
Admittedly, the sleeve seems to be a less intuitive type of case but perhaps readers like these. You can buy them at SFBags.com .