Some sensors and florescent paint from the Jerez test. After the jump, Notice how a characteristic of the top 2011 cars are the very short sidepods and low gearbox to allow as much space as possible for airflow to wrap around the rear and into the diffuse/rear wing area.
Notice the shape of the cowling on the Red Bull
Mercedes has something similar
As does Lotus Renault
And the Yellow and Green Lotus..