Exploring Space with Chip-sized Satellites

You have heard of space chimps, now it’s time for space CHIPS. Could the future of space exploration be to create tiny micro-machine sized space craft? Some researchers feel this will be the more economical form of space flight.
Miniaturization will inevitably mean limitation—less power, fewer instruments, and reduced ability to store and broadcast data. But dust-mote-size spacecraft could do things that no current space probe can do: coast without a parachute onto the plains of Mars or float for weeks in the soupy atmosphere of Titan. They could be mass-produced and launched by the thousands to form vast space-based networks of sensors. And if the probes could be made thin and lightweight enough, alternative forms of propulsion could eventually send them to distant worlds, without the need for rocket fuel.

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Max Brookks' definitive Zombie Survival Guide also discusses the advantages of bikes- along with what's already noted, they are easier to repair than a car, and if you have to, you can carry them over/around obstacles. I suspect they don't get used much in zombie movies because it IS hard to look cool riding one.
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Terrible Idea about the armor. Unless it's super lightweight. During an apocalypse, every ounce you carry has to be counted. Same thing applies to people who go hunting in the mountains or any rough terrain. They literally weigh energy bars and make everything perfectly efficient in their backpacks.
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