38. The method of claim 29 , wherein the at least one item of supplemental content relates to an article, a person, or a concept, and the at least one item of supplemental content comprises at least one of: text, audio, video, a multimedia presentation, a photograph, an image, a uniform resource locator, a computer application, data, commentary, advertising copy, a keyword, a tag, an element that encourages interactive participation by the viewer, variable data, raw data, stylized information, or a placeholder.
39. The method of claim 38 , wherein the article, person or concept is depicted in or suggested by the media stream.