Xen lures big-name endorsements

Quote from zdnet.

BOSTON--In just a few short months, an open-source software package called Xen has been catapulted from obscurity to the limelight as many computing industry powers throw their weight behind the project.

Xen lets multiple operating systems run on the same computer, a feature that's useful for extracting as much work as possible from a single system. The technology is common among high-end servers today, but on mainstream systems it requires proprietary "virtual machine" software from EMC subsidiary VMware.
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The requirement for a modified operating system will loosen with Intel's coming Vanderpool Technology, or VT, due in 2005, Pratt said. It will mean unmodified operating systems will run on Xen, though not as fast as modified ones. That means Windows will run on Xen even though open-source programmers don't have access to change Windows itself.