At this point, the only way to rid ourselves of this menace for good is to turn her into a punchline preemptively so that she can't take her religious fanaticism/ignorance/diva-ness into any real power. As I recall, this plan worked pretty well in the film The Dead Zone, in which Christopher Walken was able to see into the future of a sleazy politician (played by Martin Sheen) to discover that he would end the world. I don't think that Palin would do that, per se, but I think she'd be so inept for the job that she'd make George W. Bush look like FDR.
In a funny way, John McCain's greatest service to his country might well have been his Palin pick, cynical and dishonest though it was. By picking Palin before she had years to become a relentlessly scripted talking point machine to hide her gaping vacuousness (a la Bush), McCain plucked her before she had that polish, when it was blindingly apparent that she had absolutely nothing going on upstairs. This is the underlying perception of her now: as a poseur who is grossly unworthy of the job for which she was applying. Her future in national politics is over just as surely as if she had held up a baby as a human shield to stop sniper fire.
McCain wound up exposing Sarah Palin for what she was. It might well turn out to be the only good thing to come out of his campaign.