It's not a completely new idea, accelerometers have been enhancing GPS devices for a while now with additional velocity and directional information when the GPS signal is weak, but now Casio
is giving it a shot in its new Exilim EX-H10 prototype camera. The "hybrid GPS" shooter does the regular geotagging thing with its onboard GPS, but when signal is weak (like when indoors, for instance), the camera augments the location data with guesstimates gleaned from its onboard accelerometers. The camera also has pretty detailed maps, so you could almost use the device for navigation, though the "pushpin" view is a good start. Hit up the source link for some more shots.