Geoff,
Wow, I never knew that. Very cool.
One other fact that a Kappa Alpha Theta Alum(VT) told me is that a Beta helped found KAT(the first greek lettered organization for women).
Other than that I do not know of any one sorority that we have a connection with. Historically speaking that is. I do know that Delta Zeta was founded on the same campus as we were. Miami of Ohio University in Oxford, Ohio.
Kevin
Beta Theta Pi