You read right. Variety.com reports that The Dark Knight will be re-releasing in theaters on January 23rd, 2009 in an effort to break the billion dollar record, and give the film one last push before the Academy Awards in February. While the release will be just weeks after the DVD and Blu-ray release of the film, Warner states that they want people to get to see the film in it's true form one last time. It is currently unknown if this includes IMAX screenings.
It should also be noted that the release date is exactly one year and a day after supporting actor, Heath Ledger died of an accidental drug overdose. In many people's eyes it was his portrayal of The Joker that really made the film come to life; so perhaps the one year anniversary re-release date was intended as a pseudo memorial for the actor.
For more on The Dark Knight you can read my review from it's midnight release back in July.