I'm in the process of porting (once again) a new Anaconda snapshot to
Sabayon (thus, to Gentoo-land). I spent several hours creating ebuilds
(basic, not fully integrated yet) for the following pkgs:

app-admin/authconfig
app-admin/firstboot
app-admin/system-config-date
app-admin/system-config-date
app-admin/system-config-keyboard
app-admin/system-config-users
app-cdr/isomd5sum
dev-python/pyblock
dev-python/python-cryptsetup
dev-python/python-meh
dev-python/python-nss
dev-python/python-report
dev-util/pykickstart
net-misc/dcbd
net-misc/fcoe-utils
sys-apps/hbaapi
sys-block/open-iscsi (see extra patches)
sys-libs/libuser

They are available in the "sabayon" overlay. Is there anybody
interested in helping me out for the integration and, perhaps,
merge-into-Portage part?
For the record, nowadays the Anaconda architecture is very clean and
allows non-rpm distros to build custom installation profiles and
backends quite easily. I'm really really impressed by the amazing work
RedHat guys did during last years.

Regards,
-- 
Fabio Erculiani
http://www.sabayon.org
http://www.gentoo.org