From TheHill.com: ‘Fahrenheit 9/11’ ban? -- Ads for Moore’s movie could be stopped on July 30:

"The [Federal Election Commission] ruling may also affect promotion of a slew of other upcoming political documentaries and films, such as "Uncovered: The Whole Truth About the Iraq War," which opens in August, "The Corporation," about democratic institutions being subsumed by the corporate agenda, or "Silver City," a recently finished film by John Sayles that criticizes the Bush administration. Another film, "The Hunting of the President," which investigates whether Bill Clinton was the victim of a vast conspiracy, could be subject to regulations if it mentions Bush or members of Congress in its ads."