The Supreme Court has set Citizens United v. Federal Election Commission for reargument in September -- before the next term of the Court begins. So it would seem to be the last case of the October 2008 term. Yet unless the Justices turn it around super-quickly, the decision will be handed down during the October 2009 term, and in all likelihood the Court will hear the case with Justice Sotomayor instead of Justice Souter.
SCOTUSBlog reports on the briefing schedule and previews the argument here. Rick Hasen further previews the case on his Election Law Blog and on Slate, and he rounds up commentary on the case here and here.