If you visit Google or Yahoo today, you will see a special logo for the 2010 FIFA World Cup Finals. Today at 2:30pm (ET) on ABC in the United States the Netherlands play Spain. Most feel Spain will win, but who knows.
Here is the Google logo:
I should note, both Google and Yahoo and others had logos for when FIFA kicked off.
Yahoo's logo today is very similar to what it was then, but the flags changed:
Yahoo's New Animated Logo: Yahoo's Old Animated Logo:
Yahoo's static logo:
Forum discussion at Google Blogoscoped Forums.