Phone with sex-offender alerts

It's not the first phone with GPS technology, but it's the first one linked to a national database of sex offenders. Nextel's Cat Trax phone "allows parents to build a 'geofence' around every listed child predator that lives within their ZIP code. The phone alerts parents through an email, text message or pager if their child enters that zone," the Associated Press reports. This new feature will be available within two months and will cost $19.99 for the first phone and $9.99 each for additional phones. "Other products, like Wherifone and Teen Arrive Alive, also help parents keep tabs on their children's whereabouts and driving habits," the AP adds.