Google's already put its stamp on the great outdoors, what with its Street View fleet chronicling the well-trodden ways of our world for Maps. Which is precisely why Mountain View's turning its attention inward for that next, great navigation innovation, as it attempts to chart a course through the wilds of indoor spaces. Hitting the Android Market in the U.S. and Japan today, the company's ever-popular app gets a full version bump to 6.0, bringing with it the inclusion of retail and airport floor plans.
The newly added indo
