You can find additional information on the releases below:

Description of Office 2010 SP1

http://support.microsoft.com/kb/2460049 

Description of SharePoint Server 2010 SP1

http://support.microsoft.com/kb/2460045 

Service Pack 1 for Microsoft SharePoint Server 2010 (KB2460045)

http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=26623 

Blogs: Office 2010 and SharePoint 2010 Service Pack 1 Availability

http://blogs.technet.com/b/office_sustained_engineering/archive/2011/06/28/announcing-office-2010-and-sharepoint-2010-service-pack-1-availability.aspx