4. The method of claim 1 , further comprising: retrieving a user relationship map for the user; determining other users that are more than one hop away from the user in the user relationship map; retrieving content by the other users as the extended content; determining quality of the extended content; and combining more extended content than engaging content to the combined list of content if the quality of the extended content is high.
4. The method of claim 1 , further comprising: retrieving a user relationship map for the user; determining other users that are more than one hop away from the user in the user relationship map; retrieving content by the other users as the extended content; determining quality of the extended content; and combining more extended content than engaging content to the combined list of content if the quality of the extended content is high. 7. The method of claim 4 , wherein combining the engaging content and the extended content comprises: combining approximately a same amount of engaging content and extended content to the combined list of content if the quality of the extended content is not high.