David Letterman and Sarah Palin haven't had the kindest relationship, as he made a joke about her daughter and statutory rape (whoops) and she called for him to more or less be fired. He sent her off last night.

Sarah Palin's last day in office is upon us, and Letterman. So how couldn't he?

Unfortunately, the affair's about as subdued as you'd expect: jokes about Todd, jokes about McCain being old, jokes about her glasses (truly: meh), and a joke about her trying to get Letterman canned.

Not that we'd expect anything to be truly offending. but, come on: Letterman's on a roll. He got his contract renewed, he's beaten The Tonight Show in ratings, and you'd kind of think he'd be able to afford a little risque humor at the expense of a politician who's given him shit (and good ratings) over the last few months. Or maybe he just needs to afford funnier writers.