Following its recent acquisition of Tumblr, Yahoo is in advanced talks to purchase social video app Qwiki for $50 million, according to sources familiar with the matter. The New York startup’s iPhone app allows users to create short movies from photos, music and video clips. Yahoo paid more than $1.1 billion for Tumblr several weeks ago and is reportedly close to purchasing San Francisco-based address book app creator Xobni for $30-$40 million. Continue reading Yahoo Continues Shopping Spree of Mobile App Companies