While it is probably true that some white space can be used as proposed, there is an issue not being covered by your conversations. There is great potential for interference caused by these radio transmitters. Radio waves are not just magic spells flying through the air. There is physics behind them and it requires a great deal of engineering to design systems that do not cause inference with each other. The people pushing to open the RF white space for their use do not care it what they implement causes interference with other radio services. They just do not care. We have the same problem with the broadband over power line people. Their systems wipe out radio communications over huge swaths of land, but they do not care. RF is complex. I am responsible for a repeater system that is having problems. There is a police frequency and a fire response frequency that when they both come on the air at the same time they wipe out the repeater I run. RF interference is a big and complex problem. But, again I will repeat, the people wanting the RF white space do not care if they wipe out other radio services.