This document provides an overview of The Open Stream API on Facebook: 1. It describes the main API calls for reading the stream (stream.get, stream.getComments, stream.getFilters) and accessing it via FQL or ATOM formats. 2. It covers what content can be written to the stream, such as status updates, photos, videos, notes, and links. Actions like liking and commenting are also possible. 3. The future may include more real-time integration across desktop, mobile, and third party apps, as well as potential privacy issues as more content is shared on Facebook.