Having read this thread as much from the beginning as I have time for (meaning I skimmed most of the really long posts), I'd like to add two points.
1) As much as I would like to say Sandra Day O'Conner or any other female Stanford graduate (1947-1978) was a member of a GLO, unless it was an academic GLO, not one woman is. Sororities were banned from campus in 1944 - all members would not have immediately graduated, thus the lag time until 1947 when I believe the last of the women graduated. Theta, Pi Phi, Kappa and DG were re-introduced to campus in 1978, though from what I gather they were not officially recognized by the university itself until 1980. Tri-Delt came back in 1984 and Chi Omega came back in 1991.
Unfortunately, DG closed in 1999.
2) I would love to claim Cybil Shepard as a sister, I cannot find her chapter of initiation and she is not listed on the website, thus I would conclude she is not a Chi Omega
I'm pretty sure the other women listed as Chi Omega alumnae really are sisters. I would like to include an up and coming designer in the soon-to-be-famous category: Liz Pineda, a Chi Omega from UCLA. She has a boutique in Madrid and if you go, you absolutely must check it out.
Edited for grammar.