Oldest fan site. Covers all of Relics current and upcoming games. Also houses the official forums with occasional posts from relic staff and other notables. Has pop-ups :(

Formerly Homeworld Universe. Quick news posting and the occasional scoop over RN make it worth reading.

Newish site, cant quite compete with the old guard but does have news posts the other sites dont. Forums are a den of incest. Not to be confused with this site, or gamespy, though with the amount of horrid green you could be forgiven for thinking they did have something in common.

Even newer site than the above, and already has a great layout. Shame its not green. Lots of Warhammer 40K and Dawn of War info too.