Over at Action trip you can find a preview of DOOM 3: Resurrection of Evil, offering hands-on singleplayer and multiplayer impressions. GameSpy also has a new preview, as do GameHelper and Telefragged. Meanwhile, on FileShack you can find a Resurrection of Evil trailer which shows about a minute and a half of gameplay footage and we have some screenshots right here.
Update: GameSpot and IGN have posted their previews, and GameSpot also has a video interview with id's Todd Hollenshead. GameZone has an article format Q&A with id Software's Matt Hooper.