Project Vague is a sandbox MMO environment in which players pilot space ships and travel a universe full of procedurally generated planets. Players will be able to harvest resources from asteroids as well as deposits located on the surface of planets and moons, which can then be used to construct bases and space stations.
I've just finished bringing this all together: I can now fly around this planet with any number of server-controlled clients. Next step will be to expand this to include remote player-controlled clients as well.