1UP: Interview with Cliff Bleszinski from Epic Games.
FilePlanet: Mini-movie and E3 2005 trailer.
GameSpot: Previews, news, movies, and screenshots.
GameSpy: Data, preview, video, and screenshots.
IGN: Screenshots, movies, news, previews, and features.
Planet Gears of War: Community site with a primer, news, forums, articles, screenshots, and links.
Team Xbox: Information, news, screenshots, and a preview.
Worth Playing: Preview, by Eric: "After all was said and done, there is no doubt in my mind that Gears of War is going to be a killer Xbox 360 title."