This is of course nonsense, you don't get a worm just by visiting Google's search pages. The worm attacks bulletin boards that are using older versions of the PHP Bulletin Board (phpBB). Full story is at 
http://news.com.com/Google+worm+targ...69.html?tag=nl 
The Santy problem originally flared up a week ago as bulletin board Web sites found their pages erased and defaced by the worm's own text. The worm spread by targeting pages that used vulnerable versions of the PHP Bulletin Board (phpBB) software, and used Google to locate those pages.