these are all great ideas and give you a lot to think about-
some of the things i thought about
work with the MEVP to bring in a speaker on spirituality or holistic healing...
recommend books on different religions, find out if faith based organizations on campuses have open houses or have speakers appearing on campus.
for those sisters who are religous maybe they would like to share certain traditions with the rest of the chapter...such as the lighting of the menorah for chanukah or a seder at passover or breaking the fast at ramadan ...those are just a couple that come to mind.
also, i would definitely work with the philanthropy chair and i would maybe try to work with the Guard on ritual.
as a chaplain, you can become a very valuable and insightful resource to your chapter....look at the precedent you are setting for all the future chaplains of your chapter
in fact, i am an advisor to Rho chapter and at Eboard this coming weekend, I am going to bring up a lot of these points to the group!