VMware just released VMware Workstation 7.0 (Build 203739) of their client desktop virtualization solution for download.   Version 7 is packed with a slew of new features and bug fixes. 

• Windows 7 — Create and run Windows 7 32-bit and 64-bit virtual machines using VMware Workstation. VMware Workstation has been enhanced for performance and to take advantage of the new Windows 7 features including Live Thumbnails and Aero Peek.
• Aero Glass — A new Windows Display Driver Model (WDDM) graphics driver has been developed for Windows Vista and Windows 7 virtual machines. The WDDM driver can display the Windows Aero user interface, OpenGL 1.4, and Shader Model 3.0. For more information on the VMware recommended graphics hardware, see the VMware Workstation User's Manual.
• Windows XP Mode Compatible — Import a Windows XP Mode virtual machine using VMware Workstation 7.0 and run the virtual machine without being prompted to enter a Windows XP license key. VMware Workstation enables the Windows XP Mode virtual machine to take advantage of more than one processor, render high-end graphics, integrate seamlessly with Unity, and transfer files easily with drag and drop, and shared folders. VMware Workstation also has the ability to run concurrently with Windows XP Mode.
• 3D Graphics Improvements for Windows XP guests — OpenGL 2.1 and Shader Model 3.0 support is now available for Windows XP virtual machines. The XPDM (SVGAII) graphics driver works with Windows XP, Windows Vista, and Windows 7. However, only Windows XP virtual machines install the XPDM graphics driver by default. To switch graphics drivers in the guest operating system, see How to Switch Between SVGAII and WDDM Drivers.
• vSphere 4.0 and ESX Support — Install and run ESX 4.0 as a guest operating system. VMware Certified Professionals (VCPs) and technical professionals can install the latest server virtualization software and experiment with server setup, conduct training, show demos, and test production configurations. Running ESX as a guest eliminates the need to have spare hardware available to run ESX natively and enables ESX to run on systems that are not listed on the ESX hardware compatibility list (HCL). For more information on the supported processors and host operating systems, see Considerations for Running an ESX Guest.
  This feature is intended for educational and demonstration purposes only and should not be used in production environments. To use this feature, you must download vSphere 4.0 from the VMware Web site and follow the installation documentation provided with vSphere to install ESX.
• Virtual Printing — Print from virtual machines without mapping network printers or installing printer drivers in the virtual machine. With virtual printing enabled in the virtual machine setting, all of the printers installed on the host operating system are available in the guest operating system. This functionality is enabled through a partnership with ThinPrint, Inc.
• Four-Way SMP — Create and run virtual machines with a total of four processor cores, which can consist of four single-core processors, two dual-core processors, or one quad-core processor like the new Intel i7.
• 32GB Guest Memory — Run virtual machines with up to 32GB of memory using VMware Workstation.
• 256-bit Encryption — Secure your virtual machines with AES256-bit encryption to prevent unauthorized users from accessing or running the configuration files.
• AutoProtect —Schedule snapshots of your virtual machine to be created at a regular interval to ensure that you always have a snapshot available to revert to when needed.
• Advanced Linux Sound Architecture (ALSA) — ALSA significantly improves the sound of virtual machines running on a Linux host and streams the audio from each virtual machine on a separate channel so that multiple virtual machines can be heard simultaneously.
• Cross-Platform License Keys — Use the VMware Workstation 7.0 license key on both the Windows and Linux versions. Make sure you read the EULA for the terms and conditions that must be met when switching platforms.
• Pause a Virtual Machine — Free your CPU resources instantaneously without powering off or suspending the virtual machine.
• Expand Virtual Disks — Increase the size of the virtual disk from within VMware Workstation. For Windows Vista and Windows 7 guests, the disk partitions can be adjusted without the use of additional software.
• Compact Virtual Disks — Reclaim unused space from a virtual disk so that the host or another virtual machine can use it.
• Shared Folder Compatibility — Increased compatibility with many Windows applications that previously were unable to read or write files to shared folders.
• On-Demand VMware Tools Download — On-demand download capability provides the latest VMware Tools for the guest operating system. This feature reduces the overall download size of VMware products by downloading only the required set of VMware Tools and and enables VMware to release new versions frequently.
• Drag and Drop Enhancements — Drag and drop enhancements include support for new file types including images and formatted text and extend the existing ability to drag and drop files to a broader set of guest and host operating systems.
• Virtual Network Editor — User interface enhancements have simplified creating and configuring virtual networks.
• Fuse Mount for Linux — Use Fuse to mount .vmdk disks on to the file system of Linux hosts.
• Simplified Collection of Support Information — Gather detailed information about multiple virtual machines and the host machine at the same time. The information is packaged in a compressed file so that you can email it to VMware support or post it on the VMware Workstation forums.
• IPv6 Support — Create a bridged connection to an IPv6 network on VMware Workstation virtual machines.