Earth from above (and more)

When I was looking through the Blue Marble stuff, I ran across a neat cross-platform star/solar system/galaxy viewer called Celestia. It's a neat way to fly around the galaxy and check out star systems, planets, and what not, but what makes it cool for our purposes are the add-ons, including some higher resolution "imagery" for Earth. Some of this imagery seems to be based on or a direct adaptation from the Blue Marble dataset. Cool.