just wanted to introduce a new project that aims to produce a library that converts FCKeditor output (XHTML 1.0) into a PDF (using iText). It's called h2pe and lives right here in sf (http://sourceforge.net/projects/h2pe/).
We are still in the planning stage, but implementation should follow in the next few days and we hope to have a working prototype (jar file) on the site by the end of the week.
The ultimate goal is to customise FCK editor's 'print preview' button to just post the XHTML source to a servlet which then responds with a PDF that accurately renders the document.
If any one (read, Java developer) is interested in actively participating then join us in h2pe's mailing list.
New project: h2pe - FCKeditor/PDF