JEFF BRIDGES, The Door in the Floor
AL PACINO, The Merchant of Venice
GAEL GARCÍA BERNAL Bad Education & The Motorcycle Diaries
JAMIE FOXX, Collateral & Ray
PAUL GIAMATTI, Sideways
Runners-up: Don Cheadle, Hotel Rwanda; Mark Ruffalo, We Don't Live Here Anymore; Matt Damon, The Bourne Supremacy; Jim Carrey, Lemony Snicket's A Series of Unfortunate Events; Tom Hanks, The Terminal; Topher Grace, Win a Date with Tad Hamilton! & (I'll assume) In Good Company.