Indie Energy Smart Geothermal™ for Buildings from Indie Energy on Vimeo.
I made some reference to this kind of process in a recent presentation on biomimicry for one of my Environmental Studies classes. Looking at a termite mound, you can see the inspiration for both solar chimneys and geothermal cooling.
When building employ these kinds of systems, they can cut their heating and cooling costs drastically.
Amory Lovins' did an excellent article in the April '05 Scientific American that included a field tested prototype in a home near Bangkok, Thailand.