MediaCreeper tracks visitors from media companies using the API available from MediaCreeper.com. Visits are visualized inside the admin area with a graph in the Dashboard Widget. Each post gets its own metabox in the editor with information about recent visits by media companies to that post.
See MediaCreeper.com Wiki and MediaCreeper.com API page for more information on the MediaCreeper service.
The MediaCreeper plugin for WordPress is developed on GitHub.com/mediacreeper.