Teaching with Google Earth

I'm fascinated by Google Earth, as you may have previously noticed. I was poking around today and found a really great blog with ideas for teaching using the software. A recent discussion there examines using video and audio embedded within Google Earth to teach something like Huckleberry Finn. The blog on the whole seems aimed toward people teaching in K-12, but there's definitely something we can learn by reading other people's ideas for their classrooms.