So Forefront Client Security SP1 is out now.  To download it go to the Microsoft Update Catalog http://catalog.update.microsoft.com/v7/site/home.aspx and search for "Forefront Client Security SP1" this will allow you to download it. 

Here is the KB http://support.microsoft.com/default.aspx/kb/951951

Here are the release notes http://technet.microsoft.com/en-us/library/cc901470.aspx