There is a company called Dust Networks that has created small wireless sensors that will detect open parking spaces on the streets of Los Angeles and San Francisco and allow drivers access to the information. The trend is gaining momentum in manufacturing. Other potential uses of smart dust include sensors in medicine, and military applications, including detecting temperature, poisonous gases, radiation, as well as surveillance (as was popularized in Michael Crichton book Prey).
I worked on a project recently that used remote sensors and connectivity and power are difficult problems.
Thin Film Solar Energy
Companies like NanoSolar are creating light weight film that captures solar power.
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