Scoble talks about Windows machines rebooting automatically. My company has a story to tell about this too. A server that runs the almost-nearly-practically production versions of our software, driving our phone systems, suddenly rebooted itself. It took us a long time to figure out what exactly had happened; we thought our software had caused a serious machine blowup, and a good chunk of the company was without phone service for several minutes. Our IT guys were aware of the automatic reboot possibility but didn't think that option was set on the machine. How it got set remains a mystery.