This from ComingSoon.net...
Despite two more wide releases having entered theaters on Wednesday, The Dark Knight topped the box office for a fourth straight weekend, adding an estimated $26 million for a massive domestic total of $441.5 million. If the estimate holds, then the Christopher Nolan-directed film has surpassed Shrek 2 ($441.226 million) to climb to the third spot on the all-time domestic blockbuster list, trailing just Star Wars Episode IV: A New Hope ($460.998 million) and Titanic ($600.788 million). Warner Bros. Pictures said it expects "Dark Knight" to end up with about $520 million domestically. The movie cost $185 million to make.
Internationally, The Dark Knight added $35.1 million at 7,000 theaters and has pushed its overseas total to $263 million for a worldwide total of $704.5 million.