GiSTEQ -- the GPS phototagger folks -- are back on the scene with TripBook, a novel approach to the art of mileage tracking. The idea is simple: You plug the device into your vehicle's lighter, at which point it powers up and preserves all the sordid details of your journey -- time, distance, route and so forth. Once your saga concludes (or, as Joseph Campbell once put it, when you return "to the world of common day") the data can be exported to your PC (sorry, Mac users) for creating IRS-compliant mileage reports. The device, vehicle adapter, USB cable and all pertinent software and manuals are available from the manufacturer for $99.