GameSpy: X3: Reunion
Review, interview, previews, screenshots, and movies.
http://pc.gamespy.com/pc/x3-reunion/

FilePlanet
Movies, trailers, and patches.
http://www.fileplanet.com/102319/section/X3:-Reunion-

GameSpot
Reviews, news, previews, images, videos, cheats, downloads, links, and a forum.
http://www.gamespot.com/pc/sim/x3reunion/

GameZone
Review, by Michael Lafferty: "X3 – Reunion not only looks amazing but the depth of gameplay makes this a galactic winner." [Score: 9 out of 10]
http://pc.gamezone.com/gzreviews/r26092.htm

GameFAQs
FAQs, cheats, and a message board.
http://www.gamefaqs.com/computer/doswin/data/927012.html