Google Search Plus Your World is all about social data. Many things Google does in social is aimed at getting information from you so they can build up your profile and return you search results and other related information which is personalised for you, based on your social graph.
To do that Google needs to know your social graph. It needs to know how you connect to entities and to other people. In some of my presentations I showed some of what Google knew of you because Google gave that information away, for free. Now it seems to have pulled the social circle data. There is no announcement and you can still find the search result, but the page itself gives a 404. (more…)