I'd love for that to come out during discovery when the lawsuit hits, but it probably never will. Blowing the whistle is also not a great option in this economy, although I wish more people did.
Given Zuckerberg's prevoius rounds in court, it's liktly to be in an email somewhere. Or maybe he's learned to have the incriminating_shit@facebook.com inbox only keep the latest 30 days or whatever.