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 Sony Seeks Agency for Corporate Branding Campaign Sprawling Marketer Talks to IPG, WPP, Omnicom for Silo-Unifying Effort By Matthew Creamer, Published on October 02, 2006 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. Register Now Already a member? Log in.