I found this list in my "IN" box from a while back. Seems I kept saving it for a rainy day in the Fed Files column, but now with the Blog, here they are!
These were issued in conjunciton with the NASA General Aviation Programs Office Small Aircraft Transportation Systems (SATS) Project;
136.1750 MHz - Digital datalink - 14KHz bandwidth
966.0000 MHz - Digital datalink
123.1750 MHz - Air to ground outside 300 km of KLFI (Langley AFB)
123.3750 MHz - Air to ground within 300 km of KLFI
166.1000 MHz - FM nationwide
166.2250 MHz - FM nationwide
167.8125 MHz - FM nationwide
168.3500 MHz - FM nationwide
171.0000 MHz - FM nationwide
171.1500 MHz - FM nationwide
162.8125 MHz - DGPS information transmission
170.1250 MHz - DGPS information transmission
170.3500 MHz - DGPS information transmission
173.3500 MHz - DGPS information transmission
Here is some information on the SATS Project:
http://sats.erau.edu/nationalsats/index.html