7. A method comprising: receiving a request for a suggested question, by a computing device over a network, from a requesting user using an online question and answer site, the question and answer site comprising questions posed by users and answers submitted by other users, the question comprising an identification of a user; formulating, by the computing device in the online question and answer site and based on the identification of the user, a first query so as to search, via the network, using a global index that relates entities known to the network with one another, for knowledge data, user profile data, social network data, spatial data, temporal data and topical data available to the network that relates to the user identification so as to identify knowledge data relevant to a current context of the identified user, wherein the knowledge data comprises questions and answers entered by a first plurality of users and the knowledge data for each question and answer additionally comprises an identification of one of a second plurality of users who consumed the knowledge data, a selection by the questioning user of a best answer from among posted answers, and consumption popularity data; transmitting, by the computing device over the network, the identified knowledge data to the requesting user.
8. The method of claim 7 wherein the request is automatically submitted on behalf of the requesting user in response to a trigger event.