CyberSphere is one of the orginal role-playing MOO's. 
For years now, many a soul has made CyberSphere their home.

CyberSphere is set in New Carthage, a bustling metropolis.
The wastelands of the American Southwest lurk behind the
city wall, and the corporate powers that pull the citizen's
strings lurk behind the inner wall.  A wide variety of
options are available for characters.  Be a decker in the
beautifully-crafted matrix system, a mechanic keeping others
cars on the road, a bounty-hunter, a reporter, or work for
one of the soulless megacorps.  The world is constantly
changing and improving, and boasts a variety of code systems
to handle many situations.  Above all, though, is the role
playing.  A dedicated hardcore group of players have been
keeping the city alive, but they could use some new blood
to let.... I mean greet.  So join us today!