Each January, an organization called American Film Renaissance asks me to vote in their poll on the best movies of the previous year. This year they want my top 5 numbered from 1 (best) to 5 (fifth best).
Last year I voted for "The Lives of Others" about the Stasi in East Germany, but it didn't make their overall top 5 because not that many people had seen it yet. This year it's not eligible because it was screened for a week in December 2006 in NY and LA for Academy Award consideration (and it beat out Pan's Labyrinth for the Best Foreign Film Oscar.
(For Best Documentary of 2006 I voted for "Idiocracy.")
So I don't really have a frontrunner in mind for 2007.
Here, by the way, are their previous winners:
Master & Commander, The Passion of the Christ, Cinderella Man, and The Pursuit of Happyness.