Wirelessly posted (iPhone 3GS: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_2 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A400 Safari/6531.22.7)
Answer to your first question, I think they are testing the new EBRCS. There is another thread about it.
After poking around on here I have a strong suspicion that what that was as well but I am having a heck of a time finding any programming info to attempt to access the system. I suppose if I pickup a 396XT and use unitracker I might be able to get the info I need to set it up and have a listen.
Well, from what I understood, it's not really active yet so you won't hear much. They are still in the testing phase and the control channels and sites aren't 100% known.
I see that the EBRCS has applied for several 700 MHz trunking licenses from the FCC: