When you boot up just about any device from HP, you get a splash screen exclaiming, "HP Invent." This may be pure marketing shtick, but in the case of the new HP iPAQ 310 Travel Companion, it's actually true: The device offers innovation that its competitors don't yet have. When you first open the box, the iPAQ 310 looks just like any other widescreen GPS unit, but once you boot it up, you'll quickly discover that it's far from ordinary. The device features the highest-resolution 4.3-inch screen I've seen, and it delivers gorgeous 3D images. At $449.99, the iPAQ 310 offers most of the features you'd expect to find in a GPS at this price point, including a capable text-to-speech engine, extensive multisegment routing and a handy Bluetooth phone interface. Live traffic, which is not included, is supported with an optional traffic receiver.