Back on September 21/22, Microsoft released its most recent cumulative updates for SQL Server 2008.  For RTM, this was Cumulative Update #7 (10.00.1818), and for SP1, this was Cumulative Update #4 (10.00.2734). However, if you have requested the SP1 CU #4 hotfix download since November 4th, the download page has some new files up there, ...