Have you ever sent out a package or letter, only to have the recipient inform you that they have not received it? You then have the wonderful task of attempting to track the package with whichever carrier you chose, and trying to discern from their vague updates just where it might be. Well now there's an alternative.
If you want to know exactly where your package is at any given time, you could use this GPS Mail Logger. It's a small device that can fit inside a standard envelope and transmits a GPS signal. You can then track it online and pinpoint its exact location.
This device seems cool and all, but with a price tag of nearly $700, I don't think I'll be getting one any time soon. Sure, there aren't any monthly fees for service, but are you really going to mail something that expensive to someone and just hope they return it?