I agree with the fact that the dreams were used to foreshadow events in the books. I'm just wondering if Bella had always been a vivid dreamer, before she moved to Forks. She had stated that she had a pretty dull life in Phoenix, no real close friends, no boyfriends, nothing out of the ordinary. I wonder if the supernatural atmosphere of Forks triggered the dreams. Had there been no werewolves and vampires, and she settled in with a human boyfriend, would her dreams still have been so vivid? Granted, the wolves and vamps multiplied her danger factor immensely. When you have much to fear, or have strong emotions about the one you love, or much to worry about in everyday life, these things tend to spill into your unconscious thoughts. Bella certainly had these 3 factors in Forks. Interesting topic!