Note of interest, especially to the geologically minded: taking a look at this image (and thanks to headsonpikes, who induced me to download the big TIFF image - my new Windows XP system didn't have any trouble with it), I briefly (well, it took an hour!) investigated the bright white spot that appears in the central Midwest in this image. It took me awhile to figure out what state it was in; there aren't a lot of notable landmarks around. The fact that it's as bright at White Sands National Monument should have clued me in quicker. The bright white spot is Oklahoma's Great Salt Plains. The green area to the north of it is the Great Salt Plains Wildlife Refuge. GSP is noted for providing the opportunity to dig for selenite crystals. So there's your geological interest point for this week.
Also, after orienting on the Rockies, I was able to locate Great Sand Dunes National Monument, which is on my list of unusual places I've visited.
Enjoy!