There are a huge number of potential Conversation Channels where you can monitor the conversation and contribute information to it. In general, these “places” can be divided into Public Channels and Organizational Channels. The main difference between the two is who controls the direction of the information in those channels.
Like Content types, the list of Conversation Channels is constantly evolving. Facebook and Twitter may be important, but there are plenty of other industry specific channels that your should consider. (See http://www.theconversationprism.com/ for an excellent list as of 2008)
Organizational Channels