I had a look at it but I have been testing quite a few converters and I have settled on writer2xhtml which is part of the writer2latex package:
http://writer2latex.sourceforge.net/index.html
I ran the above document through it and I'm actually quite impressed. I don't know if pincette are willing to also publish the epub version but I'm willing to attach it if people want to have a look at what writer2xhtml does (it exports not only to xhtml but also directly to epub)
Regards,
Joop