PSK31 has been around a few years now. It is slow, but seems reliable enough. What really need is a linear FM system that will allow us to transmit hi-fidelity and ultrasonic audio over a carrier using less than 5 Khz of deviation bandwidth. Then we can really send data quickly.

That ought to spin the heads on a few of our techies here!!! <img src="/images/graemlins/grin.gif" alt="" />
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)