One of the projects I found via C*S*F was Project MyMumbaiCar [note - only IE compatible].
MyMumbaiCar is a carpool manager running on GoogleMaps.
I think it's a great idea. Will save fuel, time and money.
Users can set up their custom locations ("Home", "Office", etc.) on a googleMap of Mumbai and then either offer rides or look for them. The system uses simple trigonometery and open source databases to find the closest rides.
Here an example of the hybrid Maps being used, which are provided by [[http://freemap.crit.org.in]] . You can see a clearer picture of this map here.
BTW I live here somewhere here - near the Cafe Coffee Day.
If you're looking for more satelite images of India you could look here [Via All Over The Map]. They include maps of Mumbai and even Pune and a galaxy of other India Cities.