First I have to plug a favorite of mine from last year. Cabin in the Woods is now available on instant Netflix.
Action: Mission Impossible II (you can now watch a marathon of all four plus the original TV series), Tomb Raider, Mercury Rising, Remo Williams: The Adventure Begins
Comedy: The Dream Team, Housesitter, Sgt. Bilko, Heart and Souls
Drama: Luv, Dirty Dancing, Into the Wild, The Man in the Moon, The Accused, Hoosiers
Family: The Legend of Johnny Lingo
Horror: Cabin in the Woods, John Dies at the End
Thriller: House of Bodies, Pulp Fiction