She killed the "bridge to nowhere."
She's got red-state cred to beat the band.
She's also got only two years of executive experience above the mayoral level, serving as the governor of a deeply odd state that combines Wyoming's libertarianism with Venezuela's petro-socialism.
She would have made an outstanding pick as Keynote speaker for the convention, but it's very hard to see how Sarah Palin is qualified to be a heartbeat away from the presidency. This is not a moot point -- John McCain is an old dude with cancer.
Maybe the McCain camp thinks they win the debate about her experience -- If she's not qualified, then how could Obama be? But that simply seems to reinforce the crassly political nature of the choice.