This post from the Reuters Environment Forum is about Google Earth 6, a feature that was added that lets people see trees in 3-D. This feature has been applied to trees in cities, and different forests. The goal of this feature is to help with conservation by creating images.
I found this post very interesting because it is similar to what we are doing with Ecosynth; creating 3-D images of ecosystems for future conservation.
Image taken from: http://blog.google.org/2010_12_01_archive.html