App of the day: Jiggler
Jiggler is a simple little application that has one goal: to keep your Mac from dozing off. Jiggler allows you to run your lengthy, processing intensive apps like dvd ripping (for backup purposes of course :)) and cd/dvd burning without the risk of interruptions caused by your screensaver or power management settings. Jiggler does this by simulating a mouse move every now and then too keep your machine alert.