1UP: Preview, by Mike Nelson: "One of the fan favorite features looks to be the real-time weather data updating in the region you are currently "flying," while your internet connection transmits the weather data to your computer every 15 minutes."
3D Gamers: Includes information, news, screenshots, and downloads.
FilePlanet: Game clients and a demo.
GameSpy: Flight Simulator X: News, previews, and screenshots.
GameZone: Preview, news, screenshots, and downloads.
IGN: Flight Simulator X: Preview, news, screenshots, and a message board.