Yeah, I've got that. In mine it's the wee triangular panel to the right of the speedo cluster with the air vent on it. I usually give it a push and it stops.......... well, for a few seconds then starts rattling again. Annoying, but not the end of the world.
Anyone got a fix for it? (without putting it in to the stealer, cos they'll just take it apart, reassemble it then something else will rattle).