The document introduces OpenSocial, a set of common APIs for building social applications across different websites. It discusses why OpenSocial is important for allowing developers to write applications using a standard API that can run on multiple social networks. It provides an overview of the OpenSocial JavaScript APIs for accessing user and friend data, activities, and persistence. It also discusses the Shindig container software and plans for upcoming REST APIs. The presentation aims to explain what OpenSocial is and its potential to increase application distribution and the social aspects of the web.