Speaking as a coastal Mississippian, there were a lot of people from my hight school who went to Ole Miss last year. A majority of them planned to join a sorority, but I think most of them either decided not to do it, dropped out during rush, or didn't get bidded.
From what I've heard, it would be a virtual impossibility to start a new NPC chapter there because the other ones have been there for such a long time. Southern tradition and all that.