Content delivery system

A system comprising:

• an article reader operable to access information for inclusion in a pool of articles, each article in the pool of articles including content metadata characterizing content of the article type;
• a sorting engine operable to input the pool of articles and individually organize the articles according to the content metadata and preference metadata associated with a user, to thereby output sorted articles for delivery to the user;
• a media-type selector operable to select a media type of at least one of the sorted articles;
• a supplemental content selector operable to select a supplemental article based on the content metadata, the preference metadata, supplemental content metadata associated with the supplemental article, and a supplemental content selection rule;
• and
• an aggregation engine operable to determine a presentation format for rendering each of the sorted articles and the supplemental article, where the presentation format is determined based on the content metadata, the preference metadata, and the media type, and further operable to aggregate the sorted articles and the supplemental article in accordance with the presentation format for delivery to the user.