Before the ignorant comments start...
...Read the actual claim:
1. A method for displaying a news feed in a social network environment, the method comprising:
monitoring a plurality of activities in a social network environment; storing the plurality of activities in a database; generating a plurality of news items regarding one or more of the activities, wherein
one or more of the news items is for presentation to one or more viewing users and relates to an activity that was performed by another user;
attaching a link associated with at least one of the activities of another user to at least one of the plurality of news items where the link enables a viewing user to participate in the same activity as the another user;
limiting access to the plurality of news items to a set of viewing users; and
displaying a news feed comprising two or more of the plurality of news items to at least one viewing user of the predetermined set of viewing users.
So, it's a little more specific than the article portrays (in particular the stuff about linking to the same activity - non essential just for newsfeed/update purposes). Silll, it's entirely possible that there is prior art - the USPTO examination process is notoriously crap at the moment.