I just saw this thread!
GeekyPenguin is right, I'm a Tri Delta at UW-Madison. Feel free to PM me with any questions you have on the Greek system here.
I know there are a number of posters from Bloomington here too. Maybe one of them will pop up.
From what I know, Indiana has a pretty competitive and traditional Greek system, NYU's is much more laid-back and untraditional, and Wisconsin is somewhere in between.