Overview: Australian inventors have boldly re-imagined communication across the spectrum of technologies: Graeme Clark's extraordinary bionic ear delivered deaf patients the sound of speech; John O'Sullivan and his CSIRO team created the world's first high-speed wi-fi that dramatically changed the communication landscape worldwide; Henry Sutton's visionary Telephane was designed in Ballarat decades before the television; and post-master James Raymond established the world's first pre-paid postage system in Sydney in 1838 with his delightfully simple pre-paid envelope.