System Center 2012 R2 has shipped the first Update Rollup, UR1.
http://support.microsoft.com/kb/2904678/en-us
There are updates available for OpsMgr 2012 R2, VMM 2012 R2, and DPM 2012 R2, in this release.
See the KB article for full details of each, with links to the individual updates and downloads.