[CentOS] Netscape Directory Server 6?

I understand that Red Hat has purchased and open-sourced (well sort
of) what was formerly known as Netscape Directory Server.  I am
looking for version 6 of netscape directory server, does anyone know
if this is available somewhere?

http://www.redhat.com/docs/manuals/dir-server/release-notes/ds60relnotes.html

Or can you only get the newest Fedora Directory Server now?