Rasmussen is out with what is to my knowledge the first and only poll taken after the Palin announcement. The polling in general is a little disconcerting, with a Palin's favorable/unfavorable rating at 53/26. But Rasmussen fails to note that there's a considerable gap between how men and women perceive Palin.
(image from 538.com)
I mainly wanted to link everyone to the post that Nate at fivethirtyeight.com has about this.
Women aren't fooled. They know this choice reeks of tokenism, and is an insult to everyone who supported Hillary Clinton. It is an insult that McCain thinks he can win women's votes this way, and the data looks like people are realizing that.