1. A system arranged to transmit an electronic recommendation to one or more members of a social network ( 100 ), the system comprising: a user activity monitor ( 304 ) adapted to determine when a set of one or more friends of a member in the social network accesses an item of media content or activity associated with at least one category, and finds it of interest; a register ( 110 ) arranged to store one or more interest scores indicating an interest to said member of one or more items of media content or activities previously recommended to said member; and a recommendation manager ( 306 ) adapted to transmit an electronic recommendation relating to said item of media content or activity to said member based on the one or more interest scores stored by said register relating to items of media content or activities of said at least one category previously recommended to said member by one or more of the set of friends.