The good news...
1) She is known as a conservative
2) She is an outsider
3) She is a woman
4) She is young
5) She is attractive
6) She is a non-nonsense, family values, self described "soccer mom"
Yes, some of those points are politically incorrect to say but...unfortunately, many people make their choices on less...if not, how could Obama be so popular?
Here's the bad news...
1) She is unknown by most of the US (Alaska might as well be Siberia for most people)
2) She has a short resume
On one hand you could say she will bring a solid conservative bent (trying to appeal to the base...something Romney wouldn't have done), she's not of the "old guard", and she may attract some Hillary supporters. One the other, no one knows her and it potentially hurts the argument against Obama's lack of experience.
It is a really nice counter point to Obama's pick of a crazy radical, inside the beltway wacko like Biden.
All, in all, I'm positive on the pick. I wonder how she'll do in a debate with Biden...he can be nasty.