With the CRS-3 (SpaceX-3) launch of a Falcon 9 v1.1 with a Dragon capsule to the ISS the F-9 will launch with landing legs for the first time.
Elon Musk Tweeted an image of the legs mounted on the first stage.
You can see a bit better detail from an earlier tweet.
The bottoms look sculpted, and the question is, do they have an aerodynamic function for controlling the flight? We already know that like a figure skater, they are expected to help control the amount of spin so the ACS system can counteract the roll.
Will they allow the stage control to 'fly' to a more accurate landing? Do they have sufficient control in the legs to do that?
It has been noted that there are actually two versions of the legs built. The original image:
Then Steve Jurvetson posted one from the SpaceX lobby.
These are supposed to be the model used since the CRS-3 flight. Note the arrow pointing out the major obvious difference.