Palin probably has more reason than most to enjoy the Letterman departure.
Check it out:

Well, it’s cool! You know, out with the old, in with the new. Maybe he’ll start a trend when we talk about politics, too, politicians who, you know, have maybe been there in Washington, D.C., a bit too long, allow some new blood in there, some new energy, new ideas to get the country back on the right track, like Elizabeth down here in Florida, district 19, where I am, supporting the candidate who is running for the right reasons.