Check this out!
 

http://aeromotions.com/

This wing is extremely expensive. I think something like the above product would take a car to the next level. The best part is that you can get one of these wing's custom sized to a cretin hight. Watch the vid's on there site, there is some nice data collecting done. I could see something like this being good for a time attack machine that needs that extra something. Looks interesting.

That's neat and cool. Moveable wings however aren't allowed in many race series though.

^ I know, the website has a list of series you can use it in.