Hate to pour water on your Palin hate fire-but Mitt Romney resigned two years prior to the end of his term--to "guess what" run for POTUS.

She may be doing an Obama here--take a senate seat--next year--which she would surely win--then run for POTUS in 2012.

This is what politicians typically do when they're getting ready to move to another political position.

We'll see what she is up to shortly

It's possible too, she is just very tired of her family getting attacked every time she walks out the front door by the left wing media--& or she just got offered a private sector job that she just can't refuse.