We have released Windows 2003 SP2 to the web, go read about it and download it from here http://www.microsoft.com/technet/windowsserver/sp2.mspx
By upgrading to Windows Server 2003 SP2, your Windows Server will benefit in many ways.
Administrators will like the improvements to the Microsoft Management Console. MMC 3.0 offers new and improved command-line tools.
You can take advantage of improved security, such as Wireless Protected Access 2 (WPA2), which will get you ready for the next generation of wireless access.
SP2 provides improved performance for SQL 2005, network scalability, and Windows virtualization.
Using Windows Deployment Services (WDS), SP2 will also tune-up your system and get it ready for Windows Vista and Windows Longhorn so that you can enjoy a seamless deployment of this new product.
New firewall per port; authentication secures traffic between the extranet environment and internal assets that are protected via IPsec domain isolation.
Update either Windows Server 2003 or Windows XP Professional x64.
The Scaleable Networking Pack (SNP) allows Windows Server 2003 administrators to cost-effectively scale their network-based applications while optimizing server performance and maximizing network throughput.
Microsoft Management Console 3.0 (MMC 3.0) gives you a framework that unifies and simplifies day-to-day system management tasks on Windows by providing common navigation, menus, toolbars, and workflow across diverse tools.
Windows Server 2003 and x64 has added support for the following languages: German, French, Korean, Chinese Traditional, Chinese Simplified, Spanish, Italian, Russian and, Portuguese (Brazilian). Windows XP Professional x64 Edition will continue to be supported in only English and Japanese.
A new XmlLite library allows developers to build high-performance XML-based applications that provide a high degree of interoperability with other applications that adhere to the XML 1.0 standard.
A new improved ICACLS tool is an upgrade of the CACLS tool in Windows Server 2003 SP2. You can us ICACLS to reset the account control lists (ACL) on files from Recovery Console, and to back up ACLs.