David Fincher's "The Social Network" won Best Sound Editing:
Dialogue and Adr in a Feature Film.
Here's the complete list of winners (highlighted) and nominees of the 2011 Motion Picture Sound Editors Golden Reel Awards.. Check out Awards Avenue for your complete list of the winners of various award-giving bodies prior to the granddaddy of them all, the Oscars!
Feature Films Category
Best Sound Editing: Feature Film Animation
*** How To Train Your Dragon
Legend of the Guardians: The Owls of Ga.Hoole
Toy Story 3
Best Sound Editing: Feature Film Documentary
Exit Through The Gift Shop
*** Rush: Beyond the Lighted Stage
Waiting for Superman