Flutterby™! : Big Blue Marble

Scarfed from Brainwagon for all of those really cool geo-data and mapping projects that I have kind of on the back burner but haven't gotten to actually implementing (and need to spend a couple of hundred bucks on hard disks to really go forward with): Blue Marble: Next Generation is a set of images of the earth processed to remove the clouds, at 2km and 8km per pixel, broken out by month. So you can watch the seasons change.