Radio transmitter/receiver thousand times smaller than human hair

A new application of 'smart dust' or nano-devices has been demonstrated. Microscopic radio detectors have been used to transmit classical music from an Ipod to speakers several meters away. The implications for nanoscale, wireless communications are, of course, enormous. Aside from global networking of information channels, the next step involves detecting light, temperature and vibrations which will have applications in everything from medicine to geosciences.
link: BBC