WPP's Ogilvy & Mather unit just announced today it has acquired a 33.3% stake in DTDigital, one of Australia's largest digital agencies. Terms were not disclosed, but Ogilvy said DTDigital is part of STW Group, and that its annual revenues grew from $1 million in 2003 to a forecast of $14 million for 2012. The Melbourne-based shop has a staff of 110.

Jon Mandel, the long-time top media buying executive and former chief of a Nielsen arm, has taken over as CEO at PrecisionDemand, a Seattle-based firm that looks to apply direct-marketing techniques to upgrade TV buying ROI.

Yahoo founder Jerry Yang has resigned his position on the company's board, reports the Wall Street Journal's blog.

High-end ad network operator Martini Media has hired Abe McCallum head of product management, responsible for analyzing sales, marketing and industry developments to shape and develop Martini's products and services. He was Founder and CEO of Clickthrough.

Online brand safety software and data provider AdSafe Media has named Michael Iantosca Chief Revenue Officer. He joins from Vevo, where he was vice president-ad sales.

This just in: Google will overtake Yahoo as the "king of display" advertising by the end of the year, predicts London-based search shop Greenlight.

The New York Post is the latest publication to introduce an app for the Kindle Fire. The app for the Amazon tablet will feature The Post’s famed (or infamous) Page Six section, an exclusive gallery of the day’s top photos and access to news, sports, business and entertainment stories. It will also include integration with Facebook, Twitter and email. The Post move comes on the heels of USA Today releasing its own dedicated Kindle Fire app and signals more confidence the device will become widespread. The device launched in November with a newsstand selling subscriptions and issues to 400 digital …

Any good network TV pricing and planning executives should be somewhat inspired, but now Tony DeMauro literally is.

Another shoe has dropped in Sprint's ongoing assessment of its agency roster. In early December, the giant telecom company shifted creative and digital duties on the $1 billion account without a review to a Publicis Groupe dedicated unit called Team Sprint which is led by Digitas. The lead creative assignment shifted from Omnicom's Goodby Silverstein & Partners to Leo Burnett. Now, a after a series of discussions, the client is also shifting traditional media duties to Publicis Groupe as well. The incumbent is WPP's Mindshare.

The state of Connecticut just announced plans for a two-year, $22 million campaign to develop a new "brand identity."