PHP and XSLT, anyone working with these?

I know that the XSLT functionality in PHP is experimental but is anyone doing any work with these? I've written some basic extensions to PHPLIB for XSLT and I am curious if anyone has some more advanced research they can share. The code that I have will return a dataset, format into XML, and then transform it using an XSLT stylesheet (template). Usage: $db = new DB_Sql_Xml; $db->query("select * from foo"); $db->get_transform("xslt_file.xslt", $db->get_xml()); I also have add XSLT parameter functionality working. While I have this code integrated into PHPLIB it could also function as a stand alone tranform class. I took some code from a phpbuilder article on this subject and improved it. You can see the class here: www.merchantempirs.net/db_xsl.inc So has anyone else done much with PHP and XSLT?