The Supreme Court upheld the Solomon Amendment, which bars colleges from accepting federal funds if they refuse to allow military recruiters on their campuses. The unanimous (8-0, since Alito had not been confirmed when the case was argued) opinion was the third written by Chief Justice John Roberts. Thirty-six law schools had challenged the law in the case, Rumsfeld v. Forum for Academic and Institutional Rights, 04-1152.
I will post a link to the opinion as soon as it is available online.
EDIT: The opinion is now available, here.