Dang, that Doom 4 trailer was pretty cool. Seemed like a mixture of Doom 3 and kind of the feel of the crazy arcade shooter action it originally kicked off.
And it has multiplayer now. Could be fun, though I'm not generally into the very fast paced shooter stuff like a Quake or UT.
Double Dang! It has its own ingame map/mode creator, where you can share what you can create. I wasn't expecting much from Doom 4, but I certainly have become impressed.