The new trailer for The Dark Knight was distributed last weekend, and prior to that there were select screenings. On some of those screenings, viewers were treated to a "Jokerised" version of the trailer, which turns out to be not as much hilarious as a work of genius. See below:
My favorite (aside from the light saber) is probably the opening, when he write "Jump!!" over the screen. This viral marketing campaign has really upped the ante in terms of whetting the appetite.