Kvetching about your PND's inability to get a proper lock could soon become a thing of the past, thanks in large part to a fresh breed of GPS satellites designed by the whiz-kids at Lockheed Martin. The program -- which is estimated to eventually cost around $5.5 billion to complete -- is set to hit its prototype phase by 2014, with a pathfinder being recently delivered to the same Colorado facility that we toured earlier this month. The Block III prototype (more accurately known as the GPS III Non-Flight Satellite Testbed), won't act