June 12 - 7:40pm EDT   Building on its text-advertising dominance, Google on Thursday said that it has reached an agreement to allow Yahoo to serve Google's Adsense search and contextual advertising as well as allow enable users on Gchat and Yahoo! Messenger to communicate without between the networks. Under the predicted non-exclusive 10-year agreement, Yahoo! has the option to display Google ads alongside its own natural search results in the U.S. and Canada and Yahoo! can serve contextually targeted ads on its U.S. and Canadian web properties as well as on its current publisher partner sites. Yahoo, however, is free to enter into similar agreements with other advertising providers and ... [full story]