Believe it, sister. The mad mobile phone scientists at DaimlerChrysler have fiddled with a camera-equipped celly to allow it to observe roadway marking when pointed out of a windshield. It is programmed to ring and alert a drowsy or just plain lousy driver if the vehicle wanders out of its lane. The technology is not new, just borrowed— the computer software was hacked from regular lane-warning cameras usually fastened to trucks and compressed onto a chip in the cell phone, which itself is placed in a special holder near the rearview mirror. While still in a trial period to insure that the camera can pick up road markings during imperfect conditions, it shouldn't be long before the technology sees widespread distribution as part of a GPS/cell phone package, since regular old cell phone kits are already common automotive accessories, as both dealer-installed and aftermarket options.