New Features in VMware Server 2:
• New operating system support: The broadest operating system support of any host-based virtualization platform currently available, including support for Windows Server 2008, Windows Vista Business Edition and Ultimate Edition (guest only), Red Hat Enterprise Linux 5 and Ubuntu 8.04.
• 64-bit operating system support: Use 64-bit guest operating systems on 64-bit hardware to enable more scalable and higher performing computing solutions. In addition, Server 2 will run natively on 64-bit Linux host operating systems.
• VMware Infrastructure (VI) Web Access management interface: VI Web Access management interface provides a simple, flexible, secure, intuitive and productive management experience. Plus, access thousands of pre-built, pre-configured, ready-to-run enterprise applications packaged with an operating system inside a virtual machine at the Virtual Appliance Marketplace.
• Independent virtual machine console: With the new VMware Remote Console, you can access your virtual machine consoles independent of the VI Web Access management interface.
• More scalable virtual machines: Support for up to 8 GB of RAM and up to10 virtual network interface cards per virtual machine, transfer data at faster data rates from USB 2.0 devices plus add new SCSI hard disks and controllers to a running virtual machine.
• Volume Shadow Copy Service (VSS): Properly backup the state of the Windows virtual machines when using the snapshot feature to maintain data integrity of the applications running inside the virtual machine.
• Support for Virtual Machine Interface (VMI): This feature enables transparent paravirtualization, in which a single binary version of the operating system can run either on native hardware or in paravirtualized mode to improve performance in specific Linux environments.
• Virtual Machine Communication Interface (VMCI): Support for fast and efficient communication between a virtual machine and the host operating system and between two or more virtual machines on the same host.
• Support for VIX API 1.6: This feature provides a programming interface for automating virtual machine and guest operations.

Homepage - http://www.vmware.com/products/server/