1UP: Preview, by Patrick Klepek: "Photorealism might be an unrealistic goal for the time being, but throwing a million, really detailed creatures on the screen simultaneously in real-time now appears to be a reality."
GameSpot: Previews, news, screenshots, and links.
GameSpy: Information, screenshots, and a movie.
IGN: News, previews, screenshots, and a video.
Team Xbox: Includes a movie, news, and screenshots.