According to several sources close to the situation, the nifty news reading app Pulse is in advanced talks to be acquired by a major “platform” company. I’ve been trying to track down who among many suitors who have looked at acquiring the mobile-focused startup that allows a user to read content from a variety of online sources, narrowing the field down to a handful. Several sources have told me that Microsoft and Yahoo have been the most engaged in talks with the startup, which currently claims it has 20 million users who read more than 10 million stories a day across the globe.