Cave was one of MANY athletes riding the new Giro Air Attack helmet. I think this thing is an awesome hybrid, and a great compromise between full aero lids, which can be tough to bear in the Hawaii heat, and a regular road helmet, which will give up a lot of time in the aero department.
Here's our breakdown of the winning rigs of Kona 2012. Interestingly, neither of these frames represents what most would consider the cream of the crop in terms of FRAME design. However, their riders appointed the rigs in tasteful, fairly minimal ways that allow for easy access to hydration and nutrition WITHOUT making big aero sacrifices. The resulting rigs are still very sleek, quietly taking their riders from T1 to T2 in style and comfort. Have a look at the article for the full scoop.