[anthk]

comp.unix.programmer Unix programming, mostly C AND Unix related.

comp.unix.shell Unix utils, awk, shell scripting.

comp.lang.c C programming help

comp.lang.c.moderated Ditto, but with less nuts

alt.os.linux.slackware Slackware users.

rec.arts.int-fiction (text adventure game creating)

rec.games.int-fiction (text adventure game announces/discussions)

rec.games.roguelike.nethack Nethack (and Slashem by extension).