The good folks at SMARTlab are putting their considerable talents to developing a game, Lost & Found - more of a social networking app for good, really - to help find missing and exploited children. When implemented, this could be a wonderful example of how games are used for social good.
Please let us all know of any and all examples of Games for Good. I will make sure to note them here and do my bit in spreading the word.
I'm serious,
Anne