It's been a long time coming, and perhaps a little too late, but you can now track your friends' and colleagues' social networking activity in Outlook 2010. Dubbed the 'Outlook Social Connector' (OSC), the functionality is available right now to all Office 2010 Beta testers.
The list of much-needed features that OSC brings to Outlook is long and juicy. 'Activity Feeds' is the new social media technology, collating the activities of your contacts into your Outlook screen. LinkedIn support is included in the current beta version, but there's no mention of anything like Twitter or Facebook support yet.
There's also neat functionality to show you all of the attachments sent between you and another contact, a communication history that shows you your recent emails with that contact, Next year, there will be added connectivity with Windows Live Messenger! There are numerous mentions of 'extensibility' and an easy-to-use developer kit, however, so I'm sure lots of other add-ons will emerge in due course.