Shacknews pointed to Computer gaming world's DOOM 3 preview. Sounds great, and a different-yet-the-same feel (FPS but slower paced and single player focused) from iD. There will be multiplayer though. And good stuff it sounds like. Beserker mode sounds like fun!
You'll have objectives, an in-game PDA, missions that include escorting NPCs and that sort of thing. Sounds great, I can't wait! No release date yet though, still "when it's done" :(