Just came back from work listening to the Avatar soundtrack. Man, I love this OST! Probably my second favorite (er... fourth) after Howard Shore's work in The Lord of the Rings (The Fellowship OST is just plain wonderful). I really hope the guy wins best Original Soundtrack this year, not only does the score compliment the movie in a truly stunning way, it's also a joy to listen to no matter where you are.
And yes, The Hurt Locker was a great movie. I mean, almost everything about it was just perfect (my only quirk was when "Doc" dies... it was so incredibly obvious, but that's just nit picking) and it was just very well done. However, I really enjoyed Avatar. It's a movie that still affects me to this day. For that reason, I want Avatar to win Best Picture, but I totally understand if The Hurt Locker wins it as well. It's sort of why I want Locker to win best director (because it's the best movie as far as what a movie is... if that makes any sense) but I want Avatar to win mostly for personal reasons.