Here is a list of the news groups and guidelines for 
posting in them:

general
 - Mud-related player announcements
 - Discussion of issues

rp
 - Role-play stories go here.

ideas-wanted
 - Ideas to improve the mud. That does NOT mean any vague
idea. Before posting to this topic, you should first check
if your idea has already been proposed and rejected and then
try to structure it into a way that would both make sense
from gameplay and background point of view.  
 - No 'I agree' posts. These go to 'misc'. 
 - No jokes. These go to 'misc'.
 - For emotes: -> "help addemote"
 - For adverbs: -> "help addadverb"

sales
 - Seeking or offering eq? That's the news group for you!
 - DO NOT post stats on equipment.

castle
 - Seeking or offering a room or even a castle? Post here.

inform
 - news group for wizzes to post general announcements. 
 - Only Wizards can post here.

Groups to announce things for the topics like new areas,
changes in a guild, etc. (meant for wizzes, but players
can post here, too) include:
race
guilds
skills
spells
welstar
crypt
perdow
wysoom
sosel
raji

Everything that doesn't fit in the topics above should go to misc.