About a year ago, 3DConnexion released the best gadget you can buy for Google Earth: The SpaceNavigator. I still enthusiastically recommend this 3D mouse as a gift to your favorite Google Earth fan. In fact, everyone I know who has one of these loves using it. Right now, 3DConnexion is offering a 15% discount off the normal $59 price for SpaceNavigator PE to Sightseer readers (<- subscribe) if you buy before November 16th at their online store. Plus, the SpaceNavigator works great with other 3D applications like Google SketchUp, NASA Worldwind, Microsoft Virtual Earth 3D, and many other 3D applications.