If you have absolutely nothing to do (I am assuming that is the case if you clicked on that headline), or want to open an extra tab in your browser, go ahead and point it towards 1-18-08.com, the official site for that silly little monster movie we know nothing about from J.J. Abrams called 1-18-08/Cloverfield.
Once you are at the site leave it open for about six minutes or so and then the sound of the monster from the trailer plays in isolation. I have had the browser open for about 15 minutes now and it appears that is all there is to do. Whoopee!