"There's finally an Indy on my desk instead of a Sun4. This means that I also have an IndyCam, so I hacked up a script to grab and save a frame of me sitting there every five minutes." (http://www.jwz.org/gruntle/nscpdorm.html)
I tried doing timed snapshots, but it frequently caught an empty chair. So I have it take a picture whenever I deactivate the screen saver, so I'm pretty much guaranteed to be in front of the machine. I also have hooks for other activities/events, like while I'm playing QuakeLive.
"There's finally an Indy on my desk instead of a Sun4. This means that I also have an IndyCam, so I hacked up a script to grab and save a frame of me sitting there every five minutes." (http://www.jwz.org/gruntle/nscpdorm.html)