Steve! Do it! Get some new wheels!
Part of the reason why my RS10s are going out of true is because of my weight. I weigh in at 215 (I lost a LOT of weight since February) and I don't think these wheels were meant to support such a weight. When I hammer down on the cranks and start hitting 40km/h, they start to wobble and go out of true while the rear brake drags. The spoke count on them don't help neither.
If this "triathlete" is who I think it is (as per GREddie) he is not just "a triathlete." He's freakin' Superman.