Around one in five Web users now send a do-not-track request when they surf the Internet, according to Interactive Advertising Bureau general counsel Mike Zaneis. He adds that the IAB expects that proportion to increase to 50%.

Yahoo’s spending spree continued unabated Wednesday with the acquisition of San Francisco-based Xobni, which could it help to further enhance Yahoo Mail. The company’s Smartr product line indexes a person’s emails from all their accounts and creates a unified address book with a profile of each contact. The profiles can include a photo, job title and email history along with a contact’s post on social networks like LinkedIn, Facebook and Twitter. Smartr apps or plugins are available for Android, Gmail, and iOS. Xobni also provides contact management tools for Outlook and BlackBerry. Yahoo didn’t disclose terms of …

In its latest mobile deal, Yahoo on Wednesday announced acquiring Qwiki, the startup behind the iPhone app that automatically turns a user’s pictures, music and videos into slideshow videos. Terms of the transaction were not disclosed, but AllThingsD estimated the purchase price at $40 million to $50 million. The tech blog first reported on the rumored deal a few weeks ago. Yahoo said in a blog post it will continue to support the Qwiki app and the company’s employees would join its New York City office “to reimagine Yahoo’s storytelling experience.” Qwiki launched its iPhone app earlier this year …

General Motors' Chevrolet unit is launching a marketing campaign for the new Silverado pickup truck. The campaign, "Strong". The effort features a song by Grammy-nominated country artist Will Hope. The effort launches July 4.

Zynga CEO Mark Pincus on Monday confirmed he’s stepping down in the wake of a widespread company layoffs and disappointing game sales. Taking over as Zynga chief executive is Don Mattrick, former head of Microsoft Xbox and gaming division. “I’ve always said to Bing and our Board that if I could find someone who could do a better job as our CEO I’d do all I could to recruit and bring that person in. I’m confident that Don is that leader,” stated Pincus in a blog post …

Patrick Mork, global marketing director for Google Play, will soon leave the company after a two-year stint, according an AllThingsD report. Prior to joining Google Android unit in 2011, Mork led marketing efforts for independent app store GetJar. He has previously also served as EMEA marketing chief for game developer Glu Mobile. His next move is not clear.    

With former New England Patriot Aaron Hernandez currently being held without bail on murder charges, the team is distancing itself even further from the disgraced athlete, offering a free jersey exchange for anyone wanting to get rid of their #81 jersey. "We know that children love wearing their Patriots jerseys, but may not understand why parents don't want them wearing their Hernandez jerseys anymore," says New England Patriots spokesperson Stacey James on the team website. "We hope this opportunity to exchange those jerseys at the Patriots ProShop for another player's jersey will be well received by parents." The exchange, good …

LinkedIn on Thursday announced hitting three million company pages on the professional networking site, with 500,000 added in just the last 12 months. “The companies on LinkedIn span all major industries around the globe, and are based in locations as remote as Tonga, as cold as Antarctica and as hot as the Western Sahara. Companies like Mashable and Virgin Media have built robust relationships with their followers, engaging them with posts about hot trends, behind the scenes look at their culture, industry best practices, and more,” stated a LinkedIn blog post. …

Facebook is launching a beta testing program for its Android apps that opens up the process to ordinary users of the dominant mobile platform. The social network will tap into a new Google Play testing service that lets people sign up through Facebook rival Google+ to test apps for bugs and crashes. After joining the Android Beta Testers Group, participants have to opt in to be a tester and then download the app immediately from Google Play or wait until the app’s next update. Facebook has typically kept the testing of new features in-house, but the step to expand the …

Gokul Rajaram, the former managing director of Google AdSense who has spent the last three years leading ad development at Facebook, has joined has joined fast-growing payments startup Square. In his new role as the company’s product engineering lead, Rajaram will lead software development for Square Register, it’s point-of-sale system for merchants. “I’ve been fortunate to work for two mission-driven, world-changing companies, and Square’s vision and passion for helping businesses grow is inspiring,” said Rajaram, in a statement today. “I’m thrilled to join the team and help build amazing products that drive economic growth and empower local businesses around …