I recently built a social portal called Mumbai Health Tracker. I am pleased to let you know that a lot of material covered in this book was used to create this application and there is no reason why you should not be able to create a similar application using the material presented in this book. Mumbai Health Tracker is a social web service that aggregates health issues reported by its residents. These health issues are then categorized, aggregated to provide information that will be useful to Individuals, Government & Doctors