AUO says they will release a 6" flexible e-paper next year (samples, anyway, with volume production to start afterwards). They are also showing a 20" e-paper module, which they say is the world's largest e-paper which is "ready for production". 

The 6" flexible e-paper is using Sipix's (owned by AUO) Microcup technology. It is made on a plastic substrate, and can be repeatedly bended. The curved radius reaches 100mm, it features 16 gray levels, 9:1 high contrast ratio and a reflectance of 33%. It consumes power only when the image is updated.

The 20" panel is very power efficient, requiring less thatn 2W. It also have 16 levels of gray.