You may want to hurry over to Amazon.com with your Flash players loaded and ready to go. They're playing the Hitchhiker's Guide trailer and I think it's only supposed to be for today (Wednesday, Feb. 16 - my wife will be so happy to know that it's on her birthday; do note the sarcasm). So hurry over. It looks pretty good. I'm giving this movie the benefit of the doubt for sure.
It's right on the Amazon.com homepage in the top of the middle column below the header banner. If you've got Flash loaded, you should see the video screen immediately. Otherwise, you will have to visit macromedia.com and download it.