Coast Guard UHF Frequencies

Officially the US Coast Guard moved it's UHF airband frequencies at the beginning of 2006. This was done to move their frequencies out of the 380-400 MHz DoD Land Mobile band. Here are the new frequencies:
237.9 MHz - Operations (secondary)
326.15 MHz - Air-to-Ground (primary)
345.0 MHz - Operations (primary)
379.05 MHz - Air-to-Ground (secondary)

However, don't take out the old Coast Guard UHF frequencies! It appears that some units are still using them for air-to-air tactical and training ops:
381.7 MHz
381.8 MHz
383.9 MHz

Federal Interoperability - Updated

Some new federal interoperability frequencies have become active in the Lone Star state recently.

170.7250 MHz, P-25 is known as "Dallas East" in the DFW Metroplex,
171.4375 MHz, P-25 is known as "Dallas West".

The same frequencies have been heard in the Houston area, but they were called "L-1" and "L-2".

I've also received information that the 171.4375 MHz frequency is used as a federal interop channel in the Philadelphia area. It is referred to as the "FIO" channel.

Anyone else hearing activity on either of these frequencies?