Just thought of an alarm screensaver. In normal mode the screensaver just display “ANTI THEFT ALARM” in various languages. Obviously the screensaver must deactivate the sleep mode. When the screensaver is activated and the power cable is removed, the notebook starts to make noise as loud as possible with the small speakers and sets it in a mode to connect to every available unencrypted network just to send an image from the iSight. Or is there already an application doing this tasks?