Comment 26 for bug 214370

I think it should play a jingle with the system beep, to satisfy bug #77010 :P

Otherwise, the issue here is that the shutdown sound can be customized. Sure, the default may be nice and short, but what happens if the user sets their own custom sound and finds that it only plays for about half a second then crumbles into nothingness?
So I don't recommend that solution, however appealing it may be.