Here's a great way to keep tabs on Gramps or that little one. It's called the SKeeper by Tadiran LifeCare, and it's a wearable personal communicator with distress alarm. With its easy-to-use controls, it lets its wearer immediately contact predefined telephone numbers, such as a relative or emergency services. When the alarm is triggered, the unit can also send text messages to designated e-mail addresses.
It can also track location and sound an alarm if its wearer goes outside a designated neighborhood. Plus, it can be remotely programmed from the Web. No pricing yet, but the unit will start shipping in the second quarter of 2006.
Product Page [TadLifeCare via Red Ferret]