Service Pack 1 for the Office 2010 products is now available, for information please see:
The link to the Project Server 2010 KB article is:
http://support.microsoft.com/kb/2460047
The link to the download is:
http://www.microsoft.com/download/en/details.aspx?id=26636
As always, deploy this to a Test / Development environment and test thoroughly before applying to Production, also have a full roll back plan in place for Production.
Thanks