As of today, we're taking bets to see how long it will take before people realize that "GPS" does not stand for "Auto Pilot." The latest "But the GPS told me to..." story is brought to you by a charter bus driver in Seattle. Piloting a coach through the Washington Arboretum -- as the GPS instructed him -- the driver ignored, or didn't see, or didn't believe (take your pick) the flashing lights and sign warning him that his 11-foot-high bus was too tall for the looming 9-foot concrete overpass.