I just saw this video. It seems the "W Duct" is the latest trick feature. No moving parts, and not exhaust blown, so it cheats the rule. The way this works is very cool. Adding downforce in turns while at the same time stalling the wing on the straights... I think that Airflow Management is just the coolest area of research in F1 today.
Enjoy. It's about 10 minutes long.