xen-pvgrub : allows to boot Xen domU kernels from a menu.lst laying inside guest filesystem ( http://xen.org/ )
xen-stubdom : allows XEN HVM guests to be run in a stubdom which improves isolation and performance. ( http://xen.org/ )
xen-tools : Xend daemon and tools ( http://xen.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a virtualization
For Paludis use this rsync : rsync://gentoo.zugaina.org/virtualization-portage
If you have a problem : ycarus(-at-)zugaina.org