Ask HN: Which E-Ink device to use for a project?

Hi all,

I have a project I want to muck about with at home and I was wondering what would be the best device to use.

  Rough requirements:
    * E-Ink display
    * 6" or larger
    * WiFi
    * Touch

I was thinking about using the Nook Touch but I'd have to muck about with rooting it, etc. I was wondering if there's any device out there that's not going to require rooting?

The application I'm creating will need to communicate with the outside world (hence WiFi), manipulate the display and receive either button or touch input.

Suggestions?