29 April 2008
Using an open redirect to hide an URL. See also Are you feeling lucky, Sergey?
http://www.google.com/pagead/iclk?sa=l&ai=PQwNRM&num=29353 &adurl=http://www.spamsite.com/
http://ad.doubleclick.net/click;h=DirEZ;~sscs=%3fhttp://www.spamsite.com/