Wired magazine walks us through an interesting denial of service scenario in their article "When Bots Attack". The hypothetical scenario sets up how a country's information infrastructure could be brought to it's knees for hours or even days through a distributed denial of service attack. "Using rented botnets, you can launch hundreds of thousands — even millions — of infobombs at a target, all while maintaining total deniability." It's a short read but an interesting one.