The vision for Portable Contacts has been around for a long time. Sites large and small share the goal of providing users a secure way to access their address books and friends lists without having to take their credentials or scrape their data.
The Django REST interface makes it easy to offer private and public APIs for existing Django models. New generic views simplify data retrieval and modification in a resource-centric architecture and provide model data in formats such as XML, JSON and YAML with very little custom code.