I was under the impression that in order to sell/distribute software made with QT you needed a commerical license from them?
(http://trolltech.com/products/qt/licenses/licensing)
Milk the cow, they not cheap either
Platform Console Edition Desktop Light Edition Desktop Edition
One Platform $1780 $1990 $3300
Two Platforms $2670 $2990 $4950
Three Platforms $3560 $3980 $6600