In the middle of October 2011 the 4th International Workshop on Massively Multiuser Virtual Environments (MMVE) took place in Nanchang, China. The workshop was co-located with the IEEE International Symposion on Haptic Audio-Visual Environments and Games (HAVE). Researchers from all over the world discussed topics as scalability, interactivity, consistency and more. 2008 this workshop was launched by a group around Gregor Schiele. He and Arno Wacker are co-organizer for the workshop in 2011 again.  Richard Süselbeck and Sebastian Holzapfel were members of the program committee. You can find further information here.