Gajah's InkCase is a mobile phone cover with an E Ink display. There are two models, one for the iPhone 5 (with a 3.5" 360x600 display) and one for the Galaxy Note II (with a 4.3" 600x800). Both cases use Bluetooth to communicate with the phone.
The iPhone 5 case will cost $99 while the Note II case will cost $129. Gajah aims to launch these for the Chinese and Malaysian markets soon.