VMware Fusion allows users to run multiple operating systems on their Mac including Microsoft Windows.  The new Fusion makes it easier to seamlessly use Windows programs as Mac OS X applications thanks to Unity 2.0.  Mac OS X Leopard Server is now supported as a virtual machine.

Key features in Fusion 2

• Unity View
• Data Sharing
• Application Sharing
• 3D and High Definition Video Acceleration
• USB Device Support
• Multiple Display Support
• Seamless Keyboard Mapping
• Driverless Printing
• Mirrored Folders

Safe Windows features in Fusion 2

• Multiple Snapshots
• AutoProtect Automatic Snapshots
• Embedded Antivirus and Antispyware Protection (a 12-month complimentary subscription to McAfee VirusScan Plus security software for Windows XP and Vista is included)

More Power in Fusion 2

• Multiple Snapshots for Power Users
• Broad Operating System Support
• Multiple CPU Virtual Machines
• VMrun
• Large RAM Support
• Virtual Appliances

Fusion 2 more Mac-like and User Friendly
VMware believes that Fusion 2 "is the easiest, most Mac-friendly way to run Windows on the Mac. A Mac-first user interface ensures that users get the features they expect, like customizable tool bars, search able Apple help, Boot Camp support, dock notification integration, and more."

As stated above, Fusion 2 is a free update for current Fusion 1 users.  New users can sign up for a 30-day trial and/or purchase the software for for a suggested retail price of $79.99.

You can read the Fusion Blog post mentioning the availability of the new version here or read the Press Release.