inspired by the Kindle OS thread I experimented with getting Debian wheezy to run in a chroot on my Kobo Touch and it runs pretty well. Xorg works fine with fbdev, just the touchscreen needed a bit of fixing in xorg-input-evdev since the driver sends out broken coordinates when a touch is ended (see the modified sources in the home directory in the image) and calibration (use xinput_calibrator or if that doesn't work do it manually in /etc/X11/xorg.conf).
To try it out put http://andreas.heider.io/kobo_debian/debian.ext3 http://andreas.heider.io/kobo_debian/debian.sh
on your onboard storage, telnet/ssh to the kobo and run /mnt/onboard/debian.sh
I preinstalled some software from http://www.mobileread.com/forums/sho...d.php?t=195702
so there's a nice menu and a few somewhat working programs. But since it's debian and a fully working X-server you can run whatever you want.
I'll post some screenshots and more info tomorrow.