A server 10 generates a program guide from a content database 20. The data base contains content descriptions including an identification of the content and the recommender of that content, which may be obtained from messages 12. A dynamic resource server 22 obtains dynamic information relating to at least one user including details of which devices, if any, are presently being used by the user as well as properties of devices associated with the user. A program guide generator 24 produces a program guide from the content descriptions and from the dynamic information, and outputs the program guide.