Some of the LugRadio posse like to play Enemy Territory occasionally. If you like that sort of thing, if nethack's no longer enough for you, if you crave some 3D action and the chance to shoot neuro in the back all at the same time, go look at clan.lugradio.org for all the detail. They've been on a bit of a hiatus from time to time, but I'm sure the interest could be high all over again.