Noticing that the actual listing for SW1 is far outdated, I thought I would add this for information's sake.

Star Wars MUSH (SW1) is the original Star Wars MU*, dating back to 1991. It diverged from canon a few years after the events of Return of the Jedi, at which point the players took over. Now several years into the age of the New Republic, the MUSH offers players the opportunity to play either as a supporter of the Republic or the Empire, or for the free spirited or indecisive types, as neither. Additionally, players can join one of two entirely original factions, or the Corporate Sector Authority, Lucas-borne descendant of the Trade Federation.

Star Wars MUSH isn't all about the wars, either. Swoop racing is a major feature of the game, as are gambling and politics. Players are encouraged to create an original character type, as there is staff support for nearly every niche imaginable. As of this writing, the game is running PennMUSH 1.8.0p4 and averages between 25 and 50 player connections at a time!