I am a CSE Lab assisitant at my Univeristy (our dept is the only dpt with a windows server). I was trying to add machines to the domain and found it easier to install Ubuntu and add it to the domain because of Likewise-open and likewise-open-gui. I would have liked to add fedora machines; however, it is is very time consuming not having likewise-open to add it.
We're working on this in a different way for Fedora 18, see: http://fedoraproject.org/wiki/Features/ActiveDirectory
Yes, the good news is its going to be easy to enroll a machine in Active Directory. Some progress with screenshots: http://stef.thewalter.net/2012/06/kerberos-and-active-directory-logins.html FWIW, the underlying 'realmd' component which is used to enroll a machine in a domain can have multiple backends which actually do the dirty work. For example Winbind or SSSD. So in theory, if they like, Likewise could write a backend so that the anything using realmd would use the Likewise implementation.