Why do you think she did this, Squid? It makes no sense to me really. She's given several reasons, but I have a hard time swallowing any of them (because she was a lame duck, because Letterman picked on her, because she wants to be president (?), because of investigations...).
I don't remember anyone ever quitting their job in politics for these reasons. Usually, they're outted for some major indiscretion, but I don't see one here. Isn't Alaska really screwed right now, too? Because she didn't want stimulus money or something?
What's your take? I don't follow politics much, so maybe I'm missing something.
ETA: I think that she doesn't want to be stuck in Alaska anymore.