Need for a syntax-highlighter

Hi PEARs, I was recently having a look at the coloring of "programlisting"- parts in peardoc. In short, the docs generated in HTML-form are sent through "colorize.php": http://cvs.php.net/co.php/peardoc/colorize.php?r=1.2 which generates the highlighted version. However, currently only php-source can be highlighted because the script uses php's built-in features for php-highlighting. It's been mentioned on pear-doc lately that being able to highlight html, xml, sql etc. in a similar form would be nice. However, for that to happen we need a highlighter that provides similar output than the php-syntax-highlighting. Having a short look at the repository I didn't yet find a package to do this for us. So has anybody maybe already experimented with writing a highlighter for these files? Maybe a general package for source-highlighting (HTML_Highlighter or similar) would be nice. Please have a look who could donate some lines :-)) Regards, Stefan