Er, excuse the cheesy headline. Check out this article in USA Today for some more info on Doom 3. While the article is pretty chock full of stuff you already know tech-wise, there are a some more quotes about the game from some of the id guys:
The monsters, however, remain the stars. At his desk, where shelves overflow with books of animé and movie effects, artist Scott clicks through a gallery of dozens of demons on his computer. "If I had to do a happy cartoon game, I don't think I could," says Scott, 33.