Ok, pulled the double din mount out (for headunit/empeg), pulled the power cable that feeds everything and reconnected it. Now everything works again. Parrot didn't even loose my voice tags & preferences. Made some calls, etc. All good.
Perhaps a firmware update past 3.10 is in order?
I'm a bit weirded out that it was stuck in mute for so long. I verified the button lights go off when the ignition is off, but it appears the embedded system is on soft power of some sort and wouldn't shut down.
Need a kill switch. Or just keep a coupla screwdrivers and shop towels in the car on long trips. Grn.
-brendan