This is the first time I've ever seen a split carbon fork like this. Aerodynamics, light weight, vibration absorption? Reminds me of the new Ridley split fork. The Ridley fork is all about aerodynamics, I'm assuming this is about compliance and that the void in the fork may actually create extra drag.
Also of note, Chad Gerlach of TV fame was in the lead of the men's pro race for a while (guy leading in the picture above).