In the kind-of-cool-definitely-scary category, there is now a simple way to track the location of a GPS-enabled cell phone called Buddyway. They do all sort of cool things like track your movements on Google maps, show charts of altitude gain, distance traveled, instantaneous speed and more. It's all very cool. But it's a little--make that a lot--scary to think of this sort of data getting out.

I imagine that the primary users of this service will be parents who want to track their kids using there cell phones.