I am not sure I would want Sarah Palin to be up for a 2012 presidential campaign. Not because I am critical of her, but because so many other people are. As much as I know the truth, that she is intelligent, capable, honest, and care about liberty, I think the Left's smear campaign in 08 was just too effective. I know of only 1 person outside of the internet who likes Sarah Palin. Even others such as friends in the Army who are otherwise mostly conservative, have bought into the "Palin's an idiot" line. I just don't see her being electable. Her solidified image of being a moron, however untrue it is, plus her quitting the governorship are all too big of obstacles for her to have a real chance.
I think we're going to need someone mostly fresh. Personally, I'm still holding out for Jindal or maybe Rand Paul in 12.