Jeff Utecht has a post about a session by Mark Wagner called Video Games as Constructivist Learning Environments. Jeff has his session notes posted on his site. I just was reading about a conference sponsored by MTVu looking at games and gaming and asking the question Can Social-Change Video Games Tackle Divorce, Poverty, Genocide? It is an interesting article and points to a forum where developers demonstrated several games that have been developed or are underdevelopment, dealing with social issues.
Examples include Disaffected, which parodies the employment experience of a Kinko's worker; Peacemaker, "a one-player game in which the player can choose to take the role of either the Israeli Prime Minister or the Palestinian President." and Darfur is Dying a simulation where the user takes on the persona of a displaced Darfurian and tries to negotiate forces that threaten the survivial of his or her refugee camp. Quite an interesting take on using games and gaming to discuss social change.