Microsoft SQL Server just posted following Cumulative Update for SQL Server 2008 Service Pack 2 and Service Pack 1.
"Keep your system up to date with the most recent cumulative update package for SQL Server 2008 SP1 and SP2."
This package contains all of the SQL Server 2008 hotfixes that have been released since the initial release of SQL Server 2008 SP2," SQL Server Sustained Engineering team stated.
CU#5 KB Article: http://support.microsoft.com/kb/2555408
This following package contains all of the SQL Server 2008 hotfixes that have been released since the initial release of SQL Server 2008 SP1.
CU#15 KB Article: http://support.microsoft.com/kb/2555406
SQL Server 2008 R2 SP1 Cumulative Update 1 contains fixes released in SQL Server 2008 R2 CU 7 & 8. For customers upgrading to Service Pack 1 from SQL Server 2008 R2 CU7 (Build 10.50.1777.0) or CU8 (Build 10.50.1797.0) should consider applying SQL Server 2008 SP1 CU 1 to ensure fixes resident on the system are available post upgrade to Service Pack 1.
CU#1 KB Article: http://support.microsoft.com/kb/2544793
[Source: SQL Server Sustained Engineering]