1. A method of automatically publishing, to one or more social network services, information about user activities regarding media content items, the method comprising: receiving, by a computing system, user activity information regarding a media content item, wherein: a user is a member of one or more social network services, the user activity information is generated in response to one or more activities taken by the user with respect to the media content item, the user activity information includes an indication of at least one of playing the media content item, viewing the media content item, purchasing the media content item, organizing the media content item, commenting on other user activity information regarding the media content item, executing the media content item, and downloading the media content item, and the user activity information is transmitted to the computing system; receiving, by the computing system, user association information that includes an indication of one or more users of the one or more social network services to whom the user activity information is to be made accessible; and automatically publishing, by the computing system, the user activity information to the one or more social network services based on the user association information, such that the user activity information is accessible to the one or more users.