In June, 2012, Yammer was acquired by Microsoft but also continues to operate as a standalone service. At the SharePoint 2012 Conference 2012, Microsoft and Yammer unveiled their first collective road map: SharePoint & Yammer Integration.
Yammer integration means you can now replace the news feed in Office 365 plans that include SharePoint. Other improvements also include SSO, seamless navigation and user interface plus search integration.
Yammer now forms an important part of Microsofts future plans with Microsoft weaving this enterprise social tools into every day work life via email, instant messaging, voice, video and line-of-business applications.