Sounds like a movie title. No, it is actually a topic you need to know about if you plan to install SQL Server 2005 or SQL Server 2008 on Windows Server 2008.
Instead of me trying to explain the details I would rather you learn from the experts on this topic. A very good blog post has been created by Shawn Hernan from the security group of the SQL Server Development team to get you started. So,....if you plan to install SQL Server 2005 or SQL Server 2008 (when it releases) on Windows Server 2008, you must read Shawn's post at: