OK, now that you have installed Update Rollup 5 for Microsoft CRM 2011, you can import the Activity Feeds solution provided by Microsoft and available here.
This new solution will provide new functionalities that are related to “social networking” (a description of the new functionalities can be found here and here).
If, like me, you get consistent ‘Access denied’ error while browsing the “What’s New” activity feed screen, this is because you are using the following Web address: http://localhost/YOUR_ORG
Instead, try using the computer’s Netbios name, for example: http://yourserver/YOUR_ORG it should work!
More information here: http://support.microsoft.com/kb/2567454/en-us
Link to the individual downloads: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27820
This update will be available through Windows Update from the November 8, 2011.