Danny Boyle‘s “Slumdog Millionaire” was high atop the iW BOT this weekend, according to initial estimates from Rentrak early this afternoon.  Screening in 10 locations, “Millionaire” scored one of the best per-theater-averages of any film this year.  Grossing $350,434, its $35,043 average even rivaled “The Dark Knight‘s whopping $36,283 average last July. It certainly found the best specialty numbers so far this season, beating recent $30,000+ openings from “Changeling,” “Noah’s Arc: Jumping The Broom” and “Rachel Getting Married.” Since opening Wednesday, the Fox Searchlight Oscar hopeful has grossed an impressive $418,131.