I think the point about Sarah needs to be the large point--that she is not qualified to be president should anything happen to McCain, and one can't be trained in that sort of thing overnight.  I think we should play on people's fears because it is fearful!!  But I think trying to educate voters on every past skeleton in Sarah's closet might not be necessary or desirable. 

Big picture is all I'm sayin.  For simple harried minds.  Don't misunderestimate them.  ;)