If the issues raised by my media partners story hit your hot button, you need to check out Mark Cooper’s new book, Media Ownership and Democracy in the Digital Information Age, which is available as a 313-page PDF (free! under a Creative Commons license).
No one has yet reviewed the book at Amazon. It links economic analysis and the First Amendment to demonstrate the need for media ownership limits. The Federal Communications Commission (FCC) tried to relax ownershp rules earlier this year. The action was met by unprecedented grassroots protest.