Using BitLocker to encrypt your system partition is a very good option to keep the computer and the data on it secure. Starting with Vista SP1 you will be able to encrypt not only the system partition but all the other partitions as well, offering even better security. When you encrypt a partition with BitLocker a recovery key is automatically generated so that you can recover the data on the computer when necessary. By default you have the choice of printing the recovery key or saving it to a USB stick or a network share.
However using a group policy setting (Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Turn on BitLocker backup to Active Directory) you can also backup the recovery key to Active Directory, which is a very good suggestion I must say. If you are running Windows Server 2008 you do not have to anything to get this working but if you would like to use Windows Server 2003 with SP1 or later to backup the BitLocker recovery key you must use scripts provided by Microsoft to extend the schema.
Microsoft also offer a tool called BitLocker Recovery Password Viewer which can be downloaded directly from Microsoft Premier Services. When this tool is installed it introduce another tab in a computer objects Properties called “BitLocker Recovery” where the BitLocker recovery keys are listed for your viewing pleasure in the case of necessary restoration. The only negative part about the tool is that it can only be installed on a Windows XP or Windows Server 2003 computer as it require that you have installed the “Window Server 2003 Administration tools for SP1” on Windows XP to get the control panel for Active Directory Users and Computers.
UPDATE: I forgot to add the link to the page where you can find all the necessary information as well as the “extend schema”-script. Here it is!