What would you pay to keep close tabs on a pet with a tendency to stray–or a teen who might be tempted to take a joyride in the family car? At CES, a company that developed E-911 technology used by many carriers is showing somewhat pricey consumer products that use GPS and cell phone services to alert you when a pet or your car stray outside a perimeter you define. 

Full Story:
http://blogs.pcworld.com/staffblog/archives/006205.html