Of some concern this time around (this comes up every few years), the air traffic controllers union (NATCA) is more supportive of the idea of privatization. The funny thing is, many controllers I've talked to, didn't even know about the privatization talks, let alone NATCA's support for it. Maybe the union should put this out there for their members before supporting it in congress.
While I only know of 1 semi-privatized (low density) control tower in the area, it's not fully privatized. The controllers are all contract employees, but all of the maintenance for the ATC related equipment, is still done by the FAA techs.
You would think, someone could point to great success of the semi-privatization of the postal service as a fine example of how NOT to do things. Of course, a big part of the problem there is that congress still has a hand in their operations.
Jeff.