X+V in a widget?

Is it possible to use XHTML+Voice in a widget? I've been playing with the samples in the X+V section of the Opera website, and I thought it would be cool if I could put that into a widget. However, the voice requires an XML document, and the widget requires HTML. Can the index.html file in the widget archive refer to an XML file from there?

If I can get voice to work in a widget, does anyone know of any issues I might run into?

Thanks for any info.