I don’t know if there are any IndyCar fans here, but there is an article on IndyCar.com about drivers Tony Kanaan and Vitor Meira doing Kona:
http://indycar.com/news/show/55-izod-indycar-series/50865-in-season-ironmen/
They also had a segment during the pre-race last weekend about it.
Just thought I would share!