Avatar crossed the worldwide billion-dollar mark this weekend. It was reported last night that the projected North American cume after 17 days in release will be $350.5 million, and that the worldwide haul will be $1.05 billion by this evening. Boxoffice.com’s Phil Contrino says Fox’s int’l figure is $1.022 billion.

I’m guessing that Sherlock Holmes$140.5 million cume is 65% its own attraction and 35% Avatar coattails (i.e., people seeing it because they couldn’t get into Avatar).