BTW, your written English is flawless and, but for an accent that doesn't hinder understanding you at all, your spoken English is practically flawless, too.
It looks good! One question, though... I noticed you were running KDE3. Would I be right in presuming, then, that your app is written in Qt3? Or is it just themed to match your system?
I believe one of the benefits of QT (and Python) is that they're pretty much cross-platform now. You'll just need QT libraries installed in Windows as well