Zeta Tau Alpha just re-did their web site. Check it out!
http://www.zetataualpha.org
Going greek was a great experience, one I would never change for the world! ZTA gave me so much, and I gave much back (you tend to even without knowing it).
Make certain to visit each of the houses or chapter rooms, and get to know the sisters in the organizations. See where you fit best.
Good luck in school, and keep us all posted.