CNN.com - Worm strikes down Windows 2000 systems - Aug 16, 2005: "Microsoft in 'emergency response' as worm reported..."
How many times does this have to happen? Will it be more critical systems next time? What if a Windows virus hits computers at a hospital? Or at an air traffic control center? I don't want it to happen, but if the world doesn't move toward an environment of diversity in operating systems, it probably will.
Even the state of Indiana recently realized a cost savings by offering Linspire Linux-based operating systems to schools across the state. They will save money up front, and over time, as maintenance costs will be generally lower than comparable Windows-based systems.