Results for any search will be labeled as "This site may harm your computer".
In which case, Google won't allow you to access any of the search results via links as they're using info from StopBadware.org to warn people away from harmful sites.
We don't remember such big worldwide outage of Google since a variant of Mydoom caused an indirect DDoS on it in 2004.
Oh well.
Back to Alta Vista?
Updated to add: Google came back to life 15:26 GMT. Updated to add: The StopBadware Blog has some additional information. Updated to add: And here's Google's blog post.
