I think it was a brilliant choice. She was not JUST chosen because she's a woman, but of course that is a benefit. I don't think the McCain camp expects her, or would have expected anything, to sway Clinton-democrats who lean toward Obama anyway. But what it can have an effect on are women voters who may be inclined to vote for McCain anyway. If this helps McCain pull in more undecided women and lock up those already leaning to him, then I think this will turn out to be a brilliant move.
But beyond that, it was also brilliant in that it helps shore up his conservative base who like her and her positions, while still looking like a maverick and appealing to moderates. Plus she is attractive, photogenic, intelligent, likeable, tough, and a good speaker, all things you need in this media age.
And I will give her at least as much experience credit being a mayor for 6 years, and a governor for 2 years, as I do to Obama in a state legislature and as a Senator. Why, because the was an actual executive who ran a government, not just a legislator who really has no experience in running anything. And as governor of a state, particularly Alaska, she has had more direct and meaningful dealings with foreign governments than Obama ever has. Honestly, I think Palin would be a more effective executive than Obama, Biden, or McCain given her background and the kind of things she's accomplished in her positions. Everyone should do themselves a favor and look at her record. Just because you haven't heard of her doesn't mean she's unqualified.
Finally, I can't wait to see Biden vs. Palin. I think they are going to underestimate her based on everything I've heard about her personality. Plus, if Biden does beat her up, he risks looking like a bully, as sexist and wrong as that may be. He's going to have a tight line to walk there.