If Mrs. Palin were the presidential candidate I might be tempted out of presidential election abstention for the first time in many years, though I'd have a lot more due diligence to do first.
I spoke to a Republican party 'insider' at a party yesterday and he said that she was anti-ESCR and in favor of making abortion illegal in cases of rape and incest. (He had no motivation to BS me -- this was a private affair that had nothing to do with politics). If true that makes her the most principled pro-life candidate on the national stage, well, ever; or at least since Reagan.
Her chances at being the presidential candidate in 2012 and/or 2016 are probably better with an Obama win. I don't see how an Obama win could spoil them, at this point, but there are a lot of ways that a McCain win could spoil them.