This is one of the Olympic Qualifier races, held in Feb, 2010, in Oldsmar, Florida. There were racer's as far away as South Africa and Japan.
A Crew from the TV Channel Versus was also there filming. Their TV coverage should air sometime over the summer. They were using 7 EX 3's.
EX 1, Canon 7D, Adobe Premier CS 4, Adobe After Effects, Manfrotto Tripods & Heads