The court case most recently before the Supreme Court regarding discrimination on college campuses last year was Christian Legal Society v. Martinez.
Here is a nice short summary from the Washington Post:
http://www.washingtonpost.com/wp-dyn/content/article/2010/04/19/AR2010041900505.html
Here are the various arguments and briefs submitted in the case from the American Bar Association: http://www.abanet.org/publiced/preview/briefs/april2010.shtml#christian