First cut. Distintly raw around the edges:
* Assumes it will be running in /home/ali/wk/slashem/web.scripts
* Assumes cache directory will be in topdir
* No build system (simple compiling and linking against libxml2)
* No configure system (eg., tagsoup)
* Output XML untested
* Doesn't set bugzilla maintainer or exporter
* Handling of artifact priorities and resolution is suspect

 <?xml version="1.0"?>

 <xsl:stylesheet version="1.0"

 		xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

 <xsl:output method="text" encoding="utf-8"/>

 <xsl:template match="//users/user[not(@name)]">

   <xsl:value-of select="."/>

   <xsl:text>&#10;</xsl:text>

 </xsl:template>

 <xsl:template match="text()"/>

 </xsl:stylesheet>