Overlay sectional data in Google Earth

I found this how-to on overlaying sectionals in Google Earth.

As a bonus it has 3D airspace polygons that show up very well when you view with some tilt.

Interesting ... on my "personalized" google home page that is the "how to of the day" for today.
How random is that? Not a very big part of the population interested in that sort of thing...

Thomas