Microsoft is implementing a Social Media component dubbed Outlook Social Connector to Office (Outlook/Sharepoint) 2010. While most people probably believed that they had been investing most of their development capital in shoring up security, the truth is you can always believe that companies like Microsoft have big plans. While not every big thing from Microsoft is a hit, it definitely seems like they are at least making some nice in-roads with Windows 7 and Office 2010. Competition is good, Google Docs and Social Media have really put the pressure on Microsoft and this is part of the response.
Check out the article on Microsofts MSDN Blog.