A colleague just brought to my attention a case handed down yesterday by the High Court of Justice (Queen's Bench Division) of England & Wales: Applause Store Productions Ltd. & Anor v Raphael  EWHC 1781 (QB) (24 July 2008).
The case relates to the misuse of private information and defamation. The defendant in this case had set up a false Facebook profile in the name of the plaintiff and established a Facebook group that was, shall we say, not flattering of the plaintiff. The court found in favour of the defendant on both claims.
What's additionally interesting is the detail with which the Court reviews the logging data generated by Facebook and provided to the Court. The case is an interesting read for privacy issues, but also is a good chance to look under the hood of Facebook, forensically speaking.