Yeah I already removed my heatshield, which did slightly rattle. Heres a quick youtube video I just made so you can here the annoying rattle. You can here the rattle at around 8 seconds and then again at 14 seconds into the video.
<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/M3x6HJtCCSs&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/M3x6HJtCCSs&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>