Continuing on Maaates theme, whatever happened to the idea of having permanent squawk codes assigned to aircraft. If each aircraft was able to apply for their own code and squawked that instead of 1200, ATC could provide a call sign and hence have a directed call made to specific aircraft operating in the area. Aircraft would not have to have a permanent code, but if you are going to operate in G or E airspace a lot it would be very convientient to have a fixed code to work with.
There are 11866 aircraft on the current registry, I would imagine that half or less of those would need or want to have a permanent code.