Greetings from the field!
OK, I can now say that Forefront Identity Manager 2010 R2 SP1 is officially announced.
This is a big milestone for the product as we have added official support for Windows 2012, SQL 2012, SharePoint 2013, Visual Studio 2012, SharePoint Foundation 2013, and Exchange 2013. For the client extensions we now support Windows 8 and Outlook 2013. For FIM reporting we have added support for System Center Service Manager 2012. Internet Explorer 10 with the Portal is fully supported too (see KB article for two hotfixes that need to be applied to the Portal for IE 10 support.)
Beyond all the new product support cycles we've improved the time it takes to upgrade from FIM 2010 to FIM 2010 R2 and fixed some bugs.
What's New in FIM 2010 R2 SP1: http://technet.microsoft.com/en-us/library/jj863246(v=ws.10).aspx
FIM 2010 R2 SP1 KB article which includes free download to SP1: http://support.microsoft.com/kb/2772429