Catch Up Lady has a descriptive overview of an ongoing viral campaign for the the upcoming Warner Brothers movie Batman: The Dark Knight. The promotion began cryptically with a site that showed nothing but the Batman logo but then progressed to several other sites that encouraged visitor involvement to reveal the identity of the actor who would play the Joker, Heath Ledger. No less than four sites told the story in a very clear and intriguing manner. get the whole story here.
