Yes, there's a workaround...
Put this in a file (suspend.sh):
echo 1 >/proc/sys/pm/suspend
Now make an entry for the launcher (e.g. for the Settings tab in /opt/QtPalmtop/apps/Settings/suspend.desktop):
Now you have to suspend your Z using this entry in the launcher or in the Opie menu.
You have to reload the icons for the entry to appear.