In 2004, someone, presumably from Apple, leaked upcoming products to multiple tech websites. Enraged, the company sued the bloggers and demanded they reveal their sources.
Winner: Bloggers. After originally losing their case, the bloggers appealed, and in 2006 the California Court of Appeals ruled that bloggers did count as journalists, and as such were protected from having to reveal their sources by the shield law.
Next Apple vs. Carl Sagan