Steps to get lxde working with the karmic-rootfs on internal partition:
xephwm5, xephfocus, startlxde1, qobi-wmhint-fix and set-focus are not included in the image i found (These files should be explained in the wiki).
In chroot, install xserver-xephyr, zenity, wmctrl, xbindkeys and habak (Usage of Xephyr should also be explained in the wiki).
Another suggestion for the wiki: Single Windowed Apps should be used with debbie, lxde is better for multi-windowed apps like gimp or dia.
Is it possible to use the accelerometer as a mouse input (like wminput)?