To answer Measi, we have the following service/professional/honoray GLO's with a good presence at Ole Miss:
Omega Phi Alpha--new in 2003
http://www.olemiss.edu/orgs/opa/
Alpha Phi Omega
Kappa Kappa Psi
http://www.olemiss.edu/orgs/kkpsi/
Sigma Alpha Iota
http://www.olemiss.edu/orgs/sai/
I think we have Tau Beta Sigma, a friend of mine was a member.