Hi,
I am a second year student at BITS Pialni, studying computer science. I now have an experience in android application development of about a year and this idea sounded really appealing . Presently, in relation to a project I used google map API and have since been following it closely. Recently I came across a new feature added that could be used in this application.
I am talking about 'heatmaps'. You can use a heatmap to visualise any data set that has a geospatial component e.g the population of cities around the world weighted by population could be efficiently shown. Such new features would add a whole new dimension to the app.