Abstract: Media is recommended to a user based on domain knowledge and correlation-based recommendation scores. A domain knowledge-based recommendation score is calculated for a user, and a correlation-based recommendation score is calculated for the user. A user recommendation score is calculated for the user regarding a media item, derived from the domain knowledge-based recommendation score and the correlation-based recommendation score. One or more media items are recommended to the user, such as by ordering or selecting media based on their user recommendation scores.

Abstract: Peer-to-peer media item recommendations are provided by presenting a selected list of media items to a first user to consider for recommendation to a friend, receiving an indication from the first user that one or more of the presented media items are to be recommended to the friend, and presenting the one or more indicated media items to the friend. The presented list comprises media items the friend hasn't rated, and is selected using a media recommendation engine.