Their advent is driving a profound debate over the definition of privacy in an era when most people now carry information-transmitting devices with them all the time.

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The United States Post Office did not require the Letter Logger to do this, however, in part because mail often travels in aircraft, and transmitting devices must be switched off during take-off and landing.

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Development of unlicensed radio transmitting devices has already led to a wave of new consumer technologies, including Wi-Fi and other innovations like digital cordless phones and in-home video distribution systems that have generated billions of dollars of economic growth.

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Additional devices and exclusive services that take advantage of this high-speed HSDPA network, such as transmitting full motion video and providing ultra-fast audio, will be available in 2006.

FORBES: Magazine Article