I think there was a Yahoo article that talked about what Phelps was carrying with him -- one thing was the trophy that he'd been awarded from the Sooper Dooper Swim International Federation (whatever) and the other was a worn, banged-up, faded, and really crappy looking kickboard.
Anyone who's ever done any sort of swimming training knows that training with kickboards kicks serious ass.
Phelps named his "The Big 'O'."
Focus of the article was essentially the same as this one. Phelps kicked ass because Big O kicked his ass. Pure and simple.