More fun with Linux: on a system with ATX powersupply and a networkcard that supports wake-on-lan get a recent kernel and ethtool and then add a line in the script that brings down your network interfaces to configure wake-on-lan on the card (after the 'down' part). Get the ether-wake program (from scyld.com which also has other great linux network drivers). And then: wake-up call for your systems!