Oo....so many nethack fans.
Check out
http://nethack.devnull.net/
Unfortunately the telnet server seems to be down at the moment.
The tournament is in a couple of months, maybe we should have a challenge for the SE players to see who can get the best score in that period.
And talking of moddable RPGs I'm surprised nobody mentioned
morrowind . The game is awesome. Can't stop playing it. Must find a daedric short sword.