Microsoft is planning on releasing Office 2010 Service Pack 1 at the end of June 2011. SP1 will be available for all 40 SKU languages of Office. Each product in the suite will have updates included in SP1 and as always they will be cumulative. For a list of some of the highlights check out the Office Sustained Engineering blog.
Update: Microsoft has released Office 2010 SP1 http://www.microsoft.com/download/en/details.aspx?id=26622
