I have two gentoo machines, and on both of them sshd is not using the /etc/login.access files that I have configured.
AFAIK this is now /etc/security/access.conf, so it would seem that the one from shadow is deprecated. ie: gentoo is pam enabled by default, so Im marking this as invalid. by all means, if you cannot get the /etc/security one to work, please let me know.