Here's the link to the microsoft website that lists the fixes and changes in SP1 for Office 2010.
A full change list can be downloaded from Microsoft's website (download Excel workbook)
Here is the link to SP1 for A2010, released 29/6/2011
http://support.microsoft.com/kb/2460049
Here's a link to an article about sp1
http://www.computerworld.com/s/article/9217989/Microsoft_delivers_Office_2010_SP1_upgrade?taxonomyId=89
