The second Service Pack for Office 2010 has been released just a little over two years after SP1.
You can install it by using the standalone installer listed below or via Microsoft Update when you have it configured to also check for Office Updates.
Update:
After applying SP2, Outlook 2010 may log multiple Warning events in the Event Viewer.
See: Event ID 27: Calendar property is missing or empty
For instructions about how to create an installation DVD containing Office 2010 with Service Pack 2 slipstreamed into it see: Slipstream Office 2010 setup with SP2
View: Description of Office 2010 SP2
Download: Service Pack 2 for Microsoft Office 2010 (KB2687455) 32-Bit Edition
Download: Service Pack 2 for Microsoft Office 2010 (KB2687455) 64-Bit Edition
Download: Service Pack 2 for Language Pack 2010 (KB2687449) 32-Bit Edition
Download: Service Pack 2 for Language Pack 2010 (KB2687449) 64-Bit Edition
Download: Microsoft Office 2010 Service Pack 2 Changes (Excel sheet)
Download: Microsoft Service Pack Uninstall Tool for Microsoft Office 2010
Download: Office 2010 Policy Templates (SP2 release)
View: All other available Office 2010 SP2 packages