Marc Zwillinger writes:
On March 7, 2013, Judge Engelemayer of the United States District Court for the Southern District of New York issued a novel order allowing the Federal Trade Commission to serve certain papers (other than the initial summons and complaint) on a defendant using Facebook private messages in conjunction with email. Read that again. A federal judge allowed the FTC to serve legal papers using Facebook.
Read more on Law Across the Wire and Into the Cloud.