1. A system for delivering advertisements associated with styles of media content, comprising: a media server including a microprocessor, and a media server application executing thereon and adapted to receive requests from media devices for media content; a media streaming logic adapted to provide the media content in response to the requests from the media devices; a media style repository that stores one or more analytical and descriptive data describing the media content to be provided to the media devices; and a targeting logic which selects an advertisement or other sponsor-directed content to be delivered in conjunction with particular items of media content, based at least partly on the analytical and descriptive data associated with those particular items of media content.