Virginia Tech massacre

According to Cindy McAdams, this may have been "the first really significant use of a Wikipedia “current events” page.

A few months later, during the Burma monks' protest, Wikipedia's "current events" page would play it's first major role in the coverage of an overseas event.

Virginia Tech massacre, Wikipedia

Reviews:
The Latest on Virginia Tech, From Wikipedia, New York Times.
Breaking news online: A short history and timeline, CindyMcAdams.com