The case is Christian Legal Society v. Martinez, and it could be an important decision on First Amendment law and government benefits more broadly. Its implications would quite likely also extend beyond on-campus student groups and also apply to tax exemptions and various other such schemes. I’ve written about the question in my Freedom of Expressive Association and Government Subsidies, 58 Stan. L. Rev. 1919 (2006), and also in this post; I’m on the run now, but I hope to blog more about the subject this week.