Debian Linux on a Kobo
How to turn your Kobo into a Debian Linux Tablet.
The details are available in the MobileRead forum. This effectively makes an open source E Ink tablet. It takes advantage of the fact that the internal memory on these devices is on an SD card embedded in the device.
The source code is available at: https://github.com/marek-g/kobo-kernel-188.8.131.52-marek for the Freescale i.MX507 processor.