The 4 main interfaces/data sources that people will interact with - news from http://daylife.com and http://groundreport.com and SMS/messaging capabilities from Twitter and Flurry mobs.CBC 'Pop Demand' allows users to specify keywords of social change that they want to keep track of. Users can submit these keywords, which are evaluated and added to the social channel taxonomy. Once the request for certain keywords exceeds a certain number, this keyword becomes an official channel. Some examples channels:* Crisis & Conflicts * Education * Energy * Social Sector Finance * Microfinance * Women's Rights * Cultural Rights * Child Rights * Human Trafficking * Poverty * Human Rights * Environment * Health * Community Improvement * Arts & Culture * Public & Social Benefit * Safety & Disaster * Employment Issues * Urban DevelopmentA user can subscribe to one or more channels over SMS. CBC continuously polls the news for these keywords, and notifies the subscribers of the respective channels over SMS or twitter with a summary of news of those keywords. CBC uses twitter to send and receive SMS. Twitter users can send a direct message to the daylife twitter user dlfe, to recommend keywords for subsciption (eg d dlfe tax 'microfinance'). The CBC system saves the keyword and adds it to the channel request list. News messages are also sent to the users as direct messages to their twitter user ids.