I’m on my way to the Where 2.0 conference, I’ll be hosting an area at the Where Fair with all my GPS projects I’ve been up to. Coincidentally, Google released Google Earth (free) and I downloaded it and started to tinker. The plus version ($20) allows you do use a GPS so of course I’m already working on a 3D GPS drawing project. Here’s a quick video of how it works (6mb QuickTime MOV). Link.
Drawing with Google Earth and a GPS