I tried following i killed matchbox and hildon and started KDE 4.1 then i was able to log out, but the screen becomes black and it seems that kdm does not wiok correctly in diablo. kde shows a lot of dbus errors anyway so maby it does not work. Its fun to play with kde, i started xephyr and then kde inside the xephyr. KDE in maemo is a lot faster and eats less memory than KDE in debian chroot.

EDIT: Funny, all maemo apps can be ysed in xephyr with kde exept microb. Microb starts in hildon, even if i click the menu item in kde.