Amongst the most anticipated new features of SharePoint 2010 were the social activity feed features which bring colleague activity as a feed to an individual. Natively the activity feed displays user profile changes, tagging and notes activity. Microsoft provides an API to extend the activity feed system with your own content. With this extensibility API it is possible to extend this to include enterprise content activity, such as activity around documents. Bringing ECM data into the activity feed gives a full 360 degree picture of activity within the SharePoint system. This article describes key areas of the logic and elements required to achieve this.