Cool... Now in Windows 2008 and 2008 R2 you can Automate Metadata Cleanup, this is a cool feature that you can take advantage without the need of using the NTDSUTIL. Of course you can still use NTDSUTIL if you want or if you've 2003 systems.
Metadata cleanup is a required procedure after a forced removal of Active Directory Domain Services (AD DS). You perform metadata cleanup on a domain controller in the domain of the domain controller that you forcibly removed. Metadata cleanup removes data from AD DS that identifies a domain controller to the replication system. Metadata cleanup also removes File Replication Service (FRS) and Distributed File System (DFS) Replication connections and attempts to transfer or seize any operations master (also known as flexible single master operations or FSMO) roles that the retired domain controller holds. These additional processes are performed automatically. You can use this procedure to clean up server metadata for a domain controller from which you have forcibly removed AD DS.
On domain controllers that are running Windows Server 2008, you can use Active Directory Users and Computers to clean up server metadata. In this procedure, deleting the computer object in the Domain Controllers organizational unit (OU) initiates the cleanup process, which proceeds automatically.
Read More here