I’ve got a new tutorial up explaining how to turn XHTML into X+V using a nice little PHP class library called MiniXML. This approach is still a bit rough, and I’m continuing to refine it but it seems to work fairly well for small to moderately sized XHTML documents.
Ultimately, I think this could become a very powerful and flexible way to turn plain old visual XHTML into multimodal X+V with nothing more than Apache/PHP and some clever coding. Have a look and let me know what you think.