Important members
Sauron, Kiza: Coders
Vampiron: GM ("Hawkmaster")

Guild skills
Fury
You go into a righteous fury against your enemy, comparable to Harkonnen battlerage. The only thing is that the strength of the fury depends, besides on the skill, on the fact that you are nice, or neutral, or...
Overpower
Ehm... let's give an easy explanation: this skill overpowers the enemy!
Weirdingway
This is an automatic skill (something like dervish or crysknife with the fremen) which makes you defend better.
Prescience
You can test your enemy and decide if you are capable of attacking him without getting your b*tt kicked.
Powerwords
There are a few words in Atreid language that you can scream while you are fighting, so that your enemy becomes frightened.
Battlelore
The automatic skill that gives you more strength in battle.
Counterstrike
This is a skill that makes you counterstrike your enemy each time you block/roll/dodge.

Other skills (not improvable)
Aid
If you're on the same planet as a Fremen or another Atreid who is in battle at the moment, you can fly to the scene of battle and assist the other one.
Boost
Exchanging CP...
Callmedic
With this command you can call the medics to heal you.
Funeral
After you killed something, you can bury it and recieve HP and CP.
Gtrain
You can train another player in a certain basic skill (requires high glvl though)
Judge
Judge armour and weaponry to see if they are worth wearing/wielding.