Google’s proposed $750 million acquisition of AdMob looks at first glance like a move sure to extend its online ad dominance to the mobile realm. But Google isn’t the first major Internet player to gobble up a mobile ad network to gain an early advantage in the space. In 2007, AOL bought Third Screen Media and Microsoft acquired European-based mobile ad company Screen Tonic.
Source:Mobile Marketing Daily: Is Google's Mobile Future Golden?
