I did this post showing how the extension will work for final users :
http://silveiraneto.net/2008/11/21/inkscape-and-javafx-working-together
It's using the current dev build of Inkscape.
Changelog:
* Public attributes instead of private functions, so can externally use them.
* Sanatize also '#' character.
* Removed a compilation warning on sanatize().
Todo:
* There's some wrong strings for i18n.
* The attribute 'name' from the class JavaFXOutput.
* Strange black stroke to be fixed.
* Gradients are not been correctly applied.