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Sun SPOT | Sig9
From the site:
Sun SPOT (Small Programmable Object Technology) is a new research project at Sun Labs that promises to turn a vision into reality, the vision being, to make wireless sensors ready for mass commercial deployment by simplifying application development for them. Wireless sensors are inexpensive battery-powered, low-power communication devices composed of radios and exceptionally small mechanical structures that sense fields and forces in the physical world.