From Microsoft’s press release regarding the “5 Best Features in Office 2010”:
Microsoft recognizes the social networking trend by adding Outlook Social Connector to the Outlook 2010 application. Outlook Social Connector will let you see emails, status updates, shared files and photos, and more all in a single view. You will also be able to see who your mutual friends are and other information to help you maintain and extend your social network.
Read more @ PCWorld