You might also want to look at Amy Bruckman's Identity Workshop: Emergent Social and Psychological Phenomena in Text-Based Virtual Reality.
And, of course, if you're interested in a sociological analysis of one particular agent and MUDs, check out Lenny Foner's What's an Agent, Anyway? A Sociological Case Study.
Lenny Foner Last modified: Sat May 23 12:28:45 EDT 1998