I have, during the F1 on water we had a huge float:<p><a href="http://ww.com/float.jpg" rel="nofollow">http://ww.com/float.jpg</a><p>The effect was pretty strange, we got a lot of press inquiries out of it, but hardly any users.<p>So it was good for something I guess.<p>Regular roadside billboards I've never had, but yesterday I saw an enormous one advertising Google Chrome.