Google Maps is now starting to show maps of indoor locations with the release of Google Maps 6.0 for Android.
Detailed floor plans automatically appear when you’re viewing the map and zoomed in on a building where indoor map data is available. The familiar “blue dot” icon indicates your location within several meters, and when you move up or down a level in a building with multiple floors, the interface will automatically update to display which floor you’re on. All this is achieved by using an approach similar to that of ‘My Location’ for outdoor spaces, but fine tuned for indoors.