New York-Andersen Consulting and Yahoo! Inc. plan to jointly build and market portals for companies. Among other initiatives, Andersen will deliver to its clients Yahoo!'s Corporate Yahoo! platform. "By teaming with Yahoo!, we can offer our clients access to thousands of content providers and personalization services, which, in turn, will enable their employees to be more productive by giving them the best access to customized information," said Andersen partner Stephen T. Dibbs in a statement. The deal is a major boon to Yahoo!, which of late has been building its presence in the b-to-b marketplace.