Quoting from the XenSource official announcement:
XenSource, Inc., the leader in infrastructure virtualization solutions based on the open source Xen hypervisor, today announced the open source community release of Xen 3.0. In its first major release in over a year, the Xen project has delivered a compelling virtualization feature set that is squarely targeted at enterprise infrastructure virtualization needs, focusing on support for symmetric multi-processing (SMP), large server memory configurations and near-native performance, and offering for the first time an ability to virtualize all guest operating systems.
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Xen 3.0 supports Intel Virtualization Technology, which allows virtualized servers to run natively on the processor, exploiting hardware acceleration for CPU and memory virtualization. This support is key to Xen’s ability to virtualize all operating systems. Xen will also support AMD’s Pacifica hardware virtualization early in 2006.Xen 3.0 also supports up to 32-way SMP virtualized guests, with an ability to dynamically “hot plug” CPUs to ensure best use of available resources. Used in conjunction with Xen’s ability to dynamically relocate a running guest from one server to another, this capability enables IT managers to optimally place workload on their available server resources. Additionally, Xen 3.0 offers support for two new addressing modes for servers with large memories: Physical Address Extension (PAE) allows 32-bit servers to address more than 4GB memory, and 64-bit addressing for up to 1TB of memory; and, support for Trusted Platform Modules, which provide hardware based security, attestation and trust, as well as security features contributed from IBM’s secure hypervisor initiative. A port of Xen, to Intel’s Itanium Architecture contributed by HP and Intel is also included, and a port of Xen to IBM’s Power PC architecture by IBM is close to completion, signaling broad cross-platform adoption of Xen.
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“Red Hat recently announced that it will integrate and support Xen 3.0 virtualization in the upcoming Red Hat Enterprise Linux release, which is expected to ship by the end of 2006”, said Brian Stevens, CTO, Red Hat Inc. “Prior to that, Xen will be available in Fedora Core 5, and we are working closely with the XenSource team to ensure a smooth inclusion in the Red Hat release process….
Notice that there is no direct mention of eventual Xen capability to run Microsoft Windows guest operating systems.
You can download sources and .rpm for SuSE, Red Hat and Fedora Core here:
http://www.xensource.com/xen/downloads
Remember you can also try Xen with no effort downloading and running the new liveCD (called Demo CD)here.