That was basically Marc's read yesterday:
For Sarah Palin to come back from somewhere, she needs to set a goal. To start with, she might immerse herself in a single issue for a few years, become an expert, and then use it to launch a broader conversation about what America ought to look like. Her policy statements to date have been, and don't believe me, just ask any smart Republican you know, treacly at best. If Palin gets smarter and more serious, if she embraces reality, then she can probably change the perception that many Americans have of her. Palin can be formidable and a real player in American politics, if she wants to. But she has so far expressed no doubt that her 2008 persona is the right persona for the future. No self-doubt. No awareness of her own humanity and imperfections.