Yes, basically. Once the empeg "commits suicide" (tells the power control PIC to turn the main CPU off) it can't come back from that state without the accessory line wobbling.

Actually, it can, on a timer; in theory it could be made so that if you kept pressing a button, it'd wake up every minute and see if anyone was pressing buttons, then go back to sleep if there was no action. Not very neat, though.

Hugo