Black boxes and global positioning systems are a parent's best friends when it comes to keeping tabs on their teens whereabouts and behavior while behind a wheel. Omnitrack, designed as an anti-theft and car tracking system, <A HREF="http://www.we-make-money-not-art.com/archives/001980.php">allows parents to monitor</A> on their computers where their children are driving, how fast they are going and the exact location of their vehicles, right down to a street address.