I got a BookArmor Shield case for my Glo:
http://www.extremeinkjet.com/Case_fo..._p/baskglo.htm
It suits my needs quite well, I travel with it in my backpack or bike pannier. I always take the Glo out of the case to read, although you can access all the buttons (but not the SD slot) if you had to read with the case on
The only real problem with it is that it is quite large. I think it would be possible to design a much smaller hard shell case, I would buy one if someone did.