System-wide logout script?

[Jaap Winius]

Hi folks,

Is there (a way to create) a system-wide logout script for Xfce? Just  
for general logout behavior, and not one that's e.g. specifically  
meant to handle an acpi event when the power button is pressed.

I'm using Debian squeeze and already use /etc/bash.bas_logout, but now  
need something equivalent for Xfce v4.6.2.

Thanks,

Jaap