if you havent heard or read, there was a apperent " leak" in information about halo3 and its new stuff, idk if this is true or not cause the video game news likes to say stuff that isnt true, but anyway here it is and enjoy.
http://www.gametrailers.com/umwatcher.php?id=19165
http://www.gametrailers.com/umwatcher.php?id=19165