I've been meaning to investigate if the auto power off on no signal of the TV can trigger the CEC to turn off the receiver. That way the auto-off of the PS3 will drop the signal to the TV, and then the TV will tell the receiver to turn off (which is the only thing left running).

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris