Directly from the Microsoft Release Service blog, here is the list of latest updates for SQL Server 2008 R2 SP2 and 2012 RTM:
SQL Server 2008 R2 SP2
SQL Server 2012 RTM
NOTE: This will be the final Cumulative Update for SQL Server 2012 RTM release. For more information on the lifecycle of SQL Server 2012 see the product support lifecycle page.
Stay Tuned! 🙂