Ok, so unlike the Google/Vodafone announcement, news that Yahoo has signed some big name companies to deploy mobile ads to 18 countries, is significant.
Yahoo said it has signed up major advertisers including Hilton’s Embassy Suites, Infiniti, Intel Corp., Nissan, Pepsi & Co, Procter & Gamble Asia-Pacific and Singapore Airlines will be initial advertisers on Yahoo’s mobile advertising system.

While Google’s making deals to add maps to cell phones, Yahoo’s actually signing deals that will bring an immediate increase to the bottom line