Games at the Lanparty?

Looking for suggestions about what games are going to be played at this year's lanparty. It helps to know ahead of time so people can have the stuff installed in advance etc. I myself haven't been playing much of any network games at all this year.
It's probably a safe bet that Half Life 2 and UT2k4 will be popular requests.
Leave comments and/or suggestions about what to play at the lanparty (if you're going) in the comments section.