You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract What You Need to Know About Facebook's Buying FriendFeed How Turning a Frenemy Into a BFF Could Make Social Searching a Snap By David Berkowitz, Published on August 10, 2009 10 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.