Achievement in Original Screenplay
Burn After Reading by Joel Coen and Ethan Coen
Milk by Dustin Lance Black
Vicky Cristina Barcelona by Woody Allen
The Visitor by Tom McCarthy
The Wrestler by Robert Siegel
Aside from Vicky Cristina, which had some limp scenes amidst some outstanding ones, this is a great, GREAT list. I'm glad they recognized the Coens, since I was apparently the only critic out there to really love Burn After Reading. My own choices might have favored Frozen River, though.
Achievement in Adapted Screenplay
The Curious Case of Benjamin Button Screenplay by Eric Roth; Based on the Short Story by F. Scott Fitzgerald
The Dark Knight Screenplay by Jonathan Nolan and Christopher Nolan; Story by Christopher Nolan and David S. Goyer; Based on Characters Appearing in Comic Books Published by DC Comics; Batman Created by Bob Kane
Doubt Screenplay by John Patrick Shanley, Based on his Stage Play
Frost/Nixon Screenplay by Peter Morgan, Based on his Stage Play
Slumdog Millionaire Screenplay by Simon Beaufoy, Based on the Novel "Q & A" by Vikas Swarup
I'm going to say it: this category SUCKS this year. The Dark Knight is the best of the bunch. Button's writing is its weakest point, the writing in Slumdog teeters back and forth, Doubt is solid but almost too theatrical, and Frost/Nixon translates grand ideas into a standard little movie that doesn't really amount to much.
This was a year for original screenplays. At least they didn't nom Revolutionary Road.