While The Jedi Assembly is seeking good guy costumers in regards to Star Wars: The Old Republic, The Dark Empire is seeking bad guy costumers from the ongoing MMO. Here's the announcement from TheDarkEmpire.org:
"The Dark Empire international dark side costume club is pleased to announce that it will accept for full membership within the organization any costume representing the dark side from the new SWTOR game, including non force-users such as Sith Troopers, Imperial Agents, and Bounty Hunters. Costumes may be canon or customized. Custom dark side costuming is a major component of TDE, and we welcome all dark side costumes, canon or custom, that conform to our costuming standards."
Click here to learn more about The Dark Empire organization.