Meh, I though TDK should've won for art direction, considering that the movie that actually won in that category was terrible. I think best special effects should've gone to
Iron Man though. Something about that movie, that suit was the best thing ever.
But seriously, Wall-E should've won for sound design and mixing, unlike the other movies nominated Wall-E was completely built from the ground up soundwise, and the results are far more spectacular and realistic than I think a lot of people realize. There is no nat. sound in animation to use as a base, its much harder to work with.
Jackman did a similar thing when he hosted the Golden Globes a couple of years ago, right? Did a Gotta Dance medley I think.