Facebook has acquired FriendFeed, a Silicon Valley company that lets Facebook members see what their friends are doing online and share content. For the time being, FriendFeed will continue to operate as normal until both teams determine longer term plans for the product. The acquisition provides Facebook with an opportunity to expand into real-time search. Because of its ability to conduct real-time search, FriendFeed has been described as a rival to Twitter. You may recall that Facebook attempted to buy Twitter