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 Yahoo's New Chief Is an Unknown to Media, Ad Circles Carol Bartz to Visit Clients Tomorrow as Industry Weighs in on Her Appointment By Abbey Klaassen, Published on January 13, 2009 0 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.