After playing a bit with razor-qt i switchet to kde netbook mode and it also works nice (after disabling desktop effects).
I couldn't find yet the reason for the random reboots, also I've found that the packages downloaded booting archlinux download corrupted but they download just fine if we are using chroot.
From WebOs I'm using the following to do the chroot:
mount -o bind /proc /media/linux/proc
mount -o bind /sys /media/linux/sys
mount -o bind /dev /media/linux/dev
chroot /media/linux /bin/bash
Just in case that helps someone.
I've made a bad looking video trying to show how nice kde netbook works
Razor Qt: http://youtu.be/9d6PIKHHC6M
KDE Netbook: http://youtu.be/pef8xHBlm7Y
Still couldn't find a way to show the keyboard widget or use the maliit keyboard without composite issues or gtk applications segfaulting all over the place.