Bellevue, Wash.and#8212;Cellular communications provider T-Mobile USA has dropped Yahoo as its exclusive mobile search engine after a little more than a year, replacing it with Google.

Londonand#8212;Fujitsu, an IT services, network and hardware provider, has selected GyroHSR London to handle marketing in the U.K. and Ireland, following a review.

New Yorkand#8212;24/7 Real Media announced the release of Open AdStream 10, the newest version of its ad management platform. The new release is integrated with Omniture SiteCatalyst to provide geo-demographic targeting to online users.

Wakefield, Mass.and#8212;The Web Analytics Association has hired Mike Levin as its first full-time executive director.

Omaha, Neb.and#8212;After months on the auction block, big database marketing holding company Infogroup has entered into an agreement to be purchased by private equity firm CCMP Capital Advisors for about $460 million, or $8 a share.

North Dartmouth, Mass.

Austin, Texasand#8212;Business information provider Hooverand#8217;s has launched a new Hoovers.com subscriber site that doubles the companyand#8217;s coverage to 65 million companies and 85 million contacts worldwide.

Miamiand#8212;MSE Enviro-Tech Corp., which makes eco-friendly alternatives to industrial chemicals, has hired Zenergy Communications, Toronto, for a rebranding effort. Zenergy will be responsible for strategy, branding and investor/media relations.

Newton, Mass.and#8212;Technology media company TechTarget announced Monday that it has acquired ebizQ.net, a Web site for business and information technology decision-makers focused on business process management and service-oriented architecture.

New Yorkand#8212;Media agency Initiative has hired Eric Bader as chief strategy officer-worldwide, a new position. Bader was previously president of BrandInHand, a mobile marketing agency he co-founded.

Marketo's Maria Pergolino provides a quick checklist for marketers looking to step up their social media efforts. A key component, she says, is ensuring the human resources are available to sustain the program.