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I only know of one advisor who posts on GC and she isn't on too much. You can always look up Personnel advisors to any chapter on the Chi Omega Everday site (www.chiomega.com/everyday). If you need help logging on let me know.
I'm not a Chi O advisor but I want to be someday. I'm working right now in the Fraternity/Sorority Life Office at California University of PA so I still get to help advise Greek students everyday. We don't have Chi O's here but I wish we did!