I don't know much about her, and that isn't for lack of trying. She's been on the short-list rumor mill for months now and there's just nothing about her. Say what you will about Obama, but he has over a decade of documented political philosophy easily available, including 2 books outlining his ideas about the world, one of those specifically dealing with policy issues (and another one coming). Joe Biden... nothing needs to be said about Joe Biden on the "experience" front.
So she's an unknown quantity, which can be fine. If McCain picked a person he knew and trusted as a legitimate presidential stand-in for him based on personal knowledge of the candidate, even if the candidate didn't have the obvious bonafides, I'd understand...
But McCain doesn't know this woman. He's "known" her for 6 months, and I put that in quotation marks because he hadn't talked to her in those 6 months except an initially meeting and a phone interview 6 months later asking if she wanted to be his Vice President.
No matter what Palin turns out to be, and I don't want to prejudge her, what on earth does that kind of decision-making process say about John McCain as a potential president of the United States?