
I'm always on the lookout for new personal tracking devices, and Ekahau's new T301W looks interesting. Instead of GPS, this waterproof wristband uses Wi-Fi to locate the wearer's position.
Accurate to within a few feet, in many ways Wi-Fi is a better choice than GPS for use indoors or underground where GPS signals cannot penetrate. The company is says the device is well suited to hospitals, cruise ships, and museums. Of course, the tracker becomes completely useless when you're not within Wi-Fi range, so this isn't a good solution for tracking children and pets, or anything that might move beyond the reliable confines of Wi-Fi range.
I could see this being used at amusement parks to help parents locate children who have wandered off, or in hospitals to track patients. Priced at $60, it's relatively inexpensive.