WordPress 4.4 was released about a week ago. I have it working for a couple of instances on my server by renaming the existing 4.3.1 ebuild to 4.4. Reproducible: Always
I've put it in my overlay in the meantime: https://github.com/salfter/portage/tree/master/www-apps/wordpress
# git show --stat | sed 's,@gentoo.org,@g.o,' commit ec13cc7f87541d157420ef03a44a203ce400f4ec Author: Sebastian Pipping <sping@g.o> Date: Sat Dec 19 21:06:18 2015 +0100 www-apps/wordpress: 4.4 (bug #568362) Package-Manager: portage-2.2.26 www-apps/wordpress/Manifest | 1 + www-apps/wordpress/wordpress-4.4.ebuild | 56 +++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+)