RewriteCond %{HTTP_HOST} ^.*\.unclick\.net
RewriteRule /ad.* Rule /ad.* http://apache.your.dom/icons/apache_pb.gif [R]
RewriteCond %{HTTP_HOST} ^.*\.unclick\.net
RewriteRule /jump.* Rule /jump.* http://apache.your.dom/icons/apache_pb.gif [R]
RewriteCond %{HTTP_HOST} ^image.*\.click2com\.net
RewriteRule .* http://apache.your.dom/icons/apache_pb.gif [R]
