At this point no one is making 400-700 Mhz hardware, and the required database for the fixed stations is not designed, much less in operation. Google and others have a working group that is working on a design spec for the database but they are not done and the FCC has not indicated if they will use the spec that Google etal come up with. Once a spec is approved then the database system has to be created and deployed before the first stations can be sold. I expect it will be 6 mo. to a year till the pieces are all in place to start the testing and manufacturing of white space networking hardware

Philly and Baltimore 2 ->38 3 ->26 6 stays 10->34 11 stays 12 stays 13 stays 17 stays 35 stays 45 ->46 57 ->32 60 ->9 (yes 9) 61 ->31 62 ->49 http://www.rabbitears.info/market.php

Every station was given a second frequency and could chose what to do with it in the long run. The answer is to contact your local stations and ask what their situation is. You can check the FCC license database which will show 2 DTV licenses for those stations that will switch from a temporary low power system to a permanent high power system.

one problem right now is many DTV signals are not being transmitted at their final full power because they are being sent from temporary transmitters and in many cases on different frequencies than then their final assignment. the stations will switch transmitters and frequencies when the switchover is made.So looking at DTV today does not necessarily tell what the signal will look like after the changeover.