OM 2007 R2 CU4 is now available for download!

KB Article: http://support.microsoft.com/kb/2449679

Direct Download Link:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=39a871e0-d996-4568-be5d-2edb6f539330

The list of all CUs shipped are also listed here: http://support.microsoft.com/kb/2453149

Enjoy!

Filip Lazar | System Center Operations Manager | Program Manager