First of all here are 2010 Academy Awards Winners with results from expers and Yahoo! Users:

NOMINATION WINNER Y! Users EXPERT PICK
Best Picture The Hurt Locker Avatar The Hurt Locker
Best Director Kathryn Bigelow - The Hurt Locker James Cameron - Avatar Kathryn Bigelow - The Hurt Locker
Best Actor Jeff Bridges - Crazy Heart Jeff Bridges - Crazy Heart Jeff Bridges - Crazy Heart
Best Actress Sandra Bullock - The Blind Side Sandra Bullock - The Blind Side Sandra Bullock - The Blind Side
Best Supporting Actor Christoph Waltz - Inglourious Basterds Christoph Waltz - Inglourious Basterds Christoph Waltz - Inglourious Basterds
Best Supporting Actress Mo'Nique - Precious Mo'Nique - Precious Mo'Nique - Precious
Best Original Screenplay The Hurt Locker Inglourious Basterds The Hurt Locker
Best Adapted Screenplay Precious Precious Up in the Air
Best Animated Feature Disney/Pixar's Up Disney/Pixar's Up Disney/Pixar's Up
Best Foreign Language Film El Secreto De Sus Ojos The White Ribbon The White Ribbon
Best Documentary Feature The Cove The Cove The Cove
Best Animated Short Logorama French Roast French Roast
Best Documentary Short Music by Prudence China's Unnatural Disaster: The Tears of Sichuan Province Music by Prudence
Best Art Direction Avatar Avatar Nine
Best Cinematography Avatar Avatar Avatar
Best Costume Design The Young Victoria Nine Nine
Best Film Editing The Hurt Locker Avatar District 9
Best Live Action Short The New Tenants Miracle Fish The New Tenants
Best Original Score Disney/Pixar's Up Avatar Disney/Pixar's Up
Best Original Song "The Weary Kind" - Crazy Heart "Take It All" - Nine "The Weary Kind" - Crazy Heart
Best Makeup Star Trek Star Trek Star Trek
Best Visual Effects Avatar Avatar Avatar
Best Sound Editing The Hurt Locker Avatar Disney/Pixar's Up
Best Sound Mixing The Hurt Locker Avatar Avatar

Now let's get some stats from here:
      All 3 results are same: 9 of 24
      Y! Users right, Experts wrong: 2 of 24
      Experts right, Y! Users wrong: 7 of 24
      Y! Users and Experts had same answer, but the wrong one: 4 of 24
      Y! Users and Experts had different answers and both was wrong: 2 of 24

So, what does this results tell us? mmm Nothing much i guess, except the fact that neither the community or the experts can be considered a truthful source of final results.