Washington Post: Newspaper Firms Join With Yahoo in Advertising Partnership — Years of rivalry between newspapers and the Internet portals that are siphoning their local advertising dollars gave way to a new partnership yesterday, as seven newspaper companies announced a wide-ranging deal with Yahoo. Also NY Times: 176 Newspapers to Form a Partnership with Yahoo and NY Times: Advertising: Google Mapping an Offline Course — Major Internet sites are showing a growing interest in the advertising business, and traditional ad firms are starting to worry.