Very cool... See the source page for a video version.
We don't have too many cameras out there in space past the moon, which is why most of our space shots are either looking outward, such as the shots taken by Hubble, or taken of Earth from the moon or closer. Which is why this video is so astounding. It's a video of the moon passing directly in front of the Earth, taken by NASA's EPOXI spacecraft from a whopping 31 million miles away.
(Via Traction Software's Greg Lloyd)