This directory used to contain ready-to-use Gentoo stages for Linux-VServer. They can now be found at http://bb.xnull.de/projects/gentoo/.
To build a new guest with one of these stages use a command similar to the following (requires util-vserver-0.30.213 or later):
vserver myguest build \ -m template \ --context 123 \ --hostname myguest \ --interface eth0:192.168.0.123/24 \ --initstyle gentoo \ -- \ -d gentoo \ -t /path/to/gentoo-vserver-$ARCH-$VERSION.tar.bz2