I'm horribly new at this. I just went through the process of setting up CentOS to use PAM + Kerboros for authenticating users to an Active Directory domain. I ended up having to read a lot of out of date or related howtos to get what I need. I documented the process I used and just got done re-doing it on a fresh VM install to make sure I covered everything. I figured rather than keeping this documentation 'in house' I'd see if there is a need/place for this on the Wiki. I'd be happy to give it a shot, or pass it along for someone else to post.