We know a few things about Quake IV: The single-player mode returns and has you fighting among the soldiers fending off the oncoming Strogg onslaught. The game runs on the Doom 3 engine, and it looks amaazing. And by all accounts from this summer's QuakeCon 2005, the multiplayer kicks @$$.
Other than that, well, we don't know a whole bunch. So while you're contenting yourself by searching for more hands-on accounts of the multiplayer mode from QuakeCon, go ahead and click the screens below to appreciate the graphical quality of this latest Quake iteration.