Greekmomjo,
Try going to this
site and click on recruitment if you haven't already. It tells a lot about the general aspects of the events.
I tried to get some letters from my close high school teachers who went to U of I, practically all of them did, but not all went greek. They thought I was better off going without letters so that I could choose the sorority right for me and with sisters who like me for who I am rather than having the letters help me out.
Let me know if you hear anything more!