There will be a delay on OCS 2007 R2 MOM/SCOM package.
While working to release the Office Communications Server 2007 R2 MOM (System Center Operations Manager 2007) Pack we encountered a blocking problem where this cannot coexist with the Office Communications Server 2007 MOM Pack. While fixing this issue will be straightforward there is the overhead of repackaging the R2 MOM Pack. With current projects we are projecting this to be completed Q1 CY09.
Read more at source: http://communicationsserverteam.com/archive/2009/02/12/367.aspx