from what i have seen, there really isnt much variety in PC games. TF2, Source, UT2k4, mebbe 1,6.
try to do a Left 4 Dead tourny, and like Ephraim said, do RA3 the new RTS out or any other RTS. I guess the do this for the January Lan instead of the Dec one, because then you can all ask your mama’s to get the new games for you so u can play them @ the LAN and not have to pay for em.
just tossin out ideas