These are papers by other people, that I found interesting. There are so many, and on such varied topics, that this is not an all-inclusive list.
2005, ACM, Locality aware dynamic load management for massively multiplayer games, Chen, Jin and Wu, Baohua and Delap, Margaret and Knutsson, Bjorn and Lu, Honghui and Amza, Cristiana
2008, IEEE Computer Society, A Dynamic Area of Interest Management and Collaboration Model for P2P MMOGs, Ahmed, Dewan Tanvir and Shirmohammadi, Shervin
1987, ACM, Flocks, herds and schools: A distributed behavioral model, Reynolds, Craig W.
2008, Winter Simulation Conference, MMOHILS: a simpler approach to valid agents in human simulation studies, Hetu, Seth N. and Tan, Gary
2007, Eurographics Association, Group behavior from video: a data-driven approach to crowd simulation, Lee, Kang Hoon and Choi, Myung Geol and Hong, Qyoun and Lee, Jehee
2009, ACM, A location aware P2P voice communication protocol for networked virtual environments, Papp, Gabor and GauthierDickey, Chris
2004, ACM, Zoned federation of game servers: a peer-to-peer approach to scalable multi-player online games, Iimura, Takuji and Hazeyama, Hiroaki and Kadobayashi, Youki
2004, ACM, Scalable peer-to-peer networked virtual environment, Hu, Shun-Yun and Liao, Guan-Ming
2007, ACM, Voronoi-based adaptive scalable transfer revisited: gain and loss of a Voronoi-based peer-to-peer approach for MMOG, Backhaus, Helge and Krause, Stefan
2006, ACM, Load-balancing for peer-to-peer networked virtual environment, Lee, Hsiu-Hui and Sun, Chin-Hua
2003, ACM, Bandwidth requirement and state consistency in three multiplayer game architectures, Pellegrino, Joseph D. and Dovrolis, Constantinos
2006, ACM, Peer clustering: a hybrid approach to distributed virtual environments, Chen, Alvin and Muntz, Richard R.
2005, ACM, Traffic characteristics of a massively multi-player online role playing game, Kim, Jaecheol and Choi, Jaeyoung and Chang, Dukhyun and Kwon, Taekyoung and Choi, Yanghee and Yuk, Eungsu