In the meantime, Google has decided to speed things up by releasing an app that can be utilized by owners of commercial buildings that have uploaded their own floor plans to Google Maps. Such individuals can download the new app onto an Android device, and then walk around to test how accurate indoor navigation is. The corrections provided by the owners, along with measurements on the strength of local wireless and cell networks, should let Google Maps dramatically improve its ability to navigate inside participating venues.
The restriction of the app to companies that have uploaded floor plans is most likely a privacy protection. Owners of some buildings (banks?) may not want such precise navigation freely available to all, so by restricting it to those who have been verified and uploaded plans of their own buildings Google can ensure that they aren’t accidentally violating a private businesses privacy rights.
Those of you who watched Google's Project Glass demo video saw indoor navigation used by in their HUD glasses; this crowd-sourcing app is the sort of thing that will make such smooth and rapid indoor navigation possible in the not-too-distant future.
source: Google Play Market via TechCrunch