"MEMS: research looks to make Casimir a force for good"
Empty space is not really empty. According to quantum-vacuum theory, at any instant it's composed of a finite amount of matter, an equal amount of antimatter and the simultaneous winking into and out of existence of a finite number of photons.
Audio Interview / Interview on CD
Text: http://www.eetimes.com/story/OEG20030825S0034