Id software's press conference just ended, announcing two new projects there. Besides the Wolfenstein multiplayer part, id is working with Nerve Software on an "untitled" multiplayer cooperative game. It won't be massively multiplayer, but it will be an online title. Besides the fact that Activision is publishing it, there wasn't much more information on that.
And as expected, Quake 4 was announced as well and is in development at Raven. It will be using the Doom engine, and set in the Quake 2 world of Stroggos. Obviously as the Doom engine is still very much in development, the game is ways off. The focus will be on the single player experience. Also ShackES has some stuff up.