Monitor what a user is doing on their X Session

[acid45]

Is there a way I can get a non-intrusive view of someone's X session? I googled it and I can't get anything relating to what I'm looking for. Esentially I just want to view what their doing on their X Session. I have SSH access to their local machine.

The system is running slackware 12
KDE (gnome slack build)

[retsaw]

I'm sure there is a VNC module for X which allows you to view and control a users X session (at least there used to be). Presumably it could be configured to only allow viewing.

[acid45]

I looked into that, I think it's called x11vnc or something to that nature. I wasn't sure it could be configured for viewing only, thanks!