If It Happens to CNN, It Happens To America:
Right now the homepage of CNN.com has a red banner headline that reads:
  BREAKING NEWS — A worm shut down computers running Windows 2000 software across the United States. More soon.
  Meanwhile, Bloomberg is running a very brief story that suggests the worm is a bit more limited in scope. Bloomberg's story begins:
  Computers at CNN's Atlanta offices have been shut down because of a computer worm, the Cable News Network said.
  Stay tuned.

  UPDATE here.