Ok, the SVG-renderer is in place. Currently, I am getting an assertion when I start a KFileDialog. That is why the name of the svg-file is still hardcoded. I will fix that as soon as my kdelibs is fixed. But it already works, here is a demo-svg:

<a href="http://websvn.kde.org/trunk/KDE/kdeedu/kalzium/ideas/svg-testoutput.svg?view=log">http://websvn.kde.org/trunk/KDE/kdeedu/kalzium/ideas/svg-testoutput.svg?view=log</a>;