i tagged it with the "obsolete" disclaimer, but it still needs a real update. can remove the bit about installing "xen-sources" since it's no longer in portage (any mainstream 3.0 kernel will do), but the section on compiling the kernel needs too much work for me to confidently update, since i don't know the tech.
I've committed a few updates, based on research on Internet & forums, but can't verify this myself anymore (been a while that I ran Xen, I use KVM now exclusively). It'd be nice if people can verify if it is still correct. Until then, i've labeled it as "draft"
