Looks like it's been banned now for the rest of the weekend and future races.
Craig Scarborough explanation of the loophole & wing design
http://scarbsf1.wordpress.com/2011/05/21/ferrari-spanish-rear-wing-extension/
Craig Scarborough explanation of the loophole & wing design
http://scarbsf1.wordpress.com/2011/05/21/ferrari-spanish-rear-wing-extension/