One issue with the current version of Google Earth is you can’t show subsurface information. GE doesn’t let you show data below its 3D rendered surface. So, for example, showing underground geological features, or wells for example. Valery Hronusov from Russia’s Academy of Science in Perm, Russia has come up with an interesting innovation. He has used his KMLer application to convert a GIS dataset showing an oil repository and related information. His innovation is to show the sub-surface data above the site where it is located underground. Valery is a very innovative guy with lots of interesting data at his fingertips. You can see other interesting works by Valery: NASA data here, here and here; tracking birds; and other GIS data.