Probably asked and answered many many times, but searching in this thread is pointless almost.
In the 777, are the CVR and FDR circuit breakers in the cockpit? are they up above the overhead panel?
It almost seems to me that even if we do find the boxes, it will be meaningless. CVR being worth only 2 hours if we're lucky and it wasn't disabled and the FDR well.. again if it wasn't disabled.