Where as commercial radio communications are moving ever higher in frequency because of the bandwidth they need, there are in fact a number of Ham Radio enthousiasts that are doing quite the opposite.
And I'm not talking about the in some countries relatively new low frequency bands in the Mid Wave range e.g. the 500 kHz band, or even the Long wave range.
For those who have been tinkering with arduino for a longer period have very likely heard of the legal battle that has been going on between "arduino.cc" and "arduino.org" who both where developing independent from each other after a conflict between the original founders of arduino took place.
The good news is that after 2 years of legal battle the outcome is that both agree to join forces and settle their differences.