On Monday, Microsoft released two cumulative updates for SQL Server:
KB #983329 : CU #10 for SQL Server 2005 SP3 (build # = 9.00.4305)
KB #2072493 : CU #2 for SQL Server 2008 R2 (build # = 10.50.1720)
Missing is an update for SQL Server 2008 SP1. It seems the SQL Server Release Services team has changed the schedule up a bit, as previously they were releasing 2005 SP3 updates on one cycle, and 2008 SP1 / 2008 R2 updates on another. It would be great if they could get all three branches onto the same schedule.