Sanguinis Nobilis
Sanguinis Nobilis was vampire-only World of Darkness MU* set in London, using an original built-for-Mush RPG system very loosely based upon the better parts of Mind's Eye Theatre (live-action WoD). It was created in Spring of 1995 by Calum Robertson; closed in August 1999. Later reopened as Sanguinis Novus.
Sanguinis Nobilis had a very good reputation as a place where vampire politics were "done right" and used a system more similar to the live-action Vampire system than the Storyteller system.
LAmush is loosely based on Sanguinis Nobilis. We use much of its code and systems. Many of our players and staffers also played/staffed on Sanguinis Nobilis.