Yesterday Linus Torvalds merged Jeremy Fitzhardinge's latest xen-upstream branch into the Linux kernel. Among the Xen virtualization changes include adding a virtual network device driver, virtual block device driver, Xenbus sysfs and virtual device hot-plug driver, and SMP guest support. The complete list of Xen changes can be found from the
Kernel git commit. Thanks go out to Jeremey Fitzhardinge for pointing out this commit.