Don't forget to sign up for Recruitment! It opened on May 14th. http://dos.orgsync.com/org/umgreeks/
Also, pay particular attention to the GPA system at Ole Miss. If you have over a 3.0 from high school, you have nothing to worry about! If yours is lower, be prepared that some sororities might not extend you a bid.
Alpha Delta Pi
Alpha Omicron Pi
Delta Delta Delta
Kappa Alpha Theta
Kappa Kappa Gamma
Pi Beta Phi
Recruitment is done a little later than most other schools, and begins at the end of September. You will meet weekly with your Gamma Chi group before rush, so you will get a lot of info that way.