Researcher Releases 'Qubes' Hardened OS

Joanna Rutkowska, a security researcher known for her work on virtualization security and low-level rootkits, has released a new open-source operating system meant to provide isolation of the OS's components for better security.

The OS, called Qubes, is based on Xen, X and Linux and is in a basic, alpha stage right now. Qubes relies on virtualization to separate applications running on the OS and also places many of the system-level components in sandboxes to prevent them from affecting each other.
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I thought this was interesting for several members that follow linux. I am certainly interested since it could be a good movement for business computing