I think jade only deals with sgml conversions using dsssl stylesheets, while your docbook files seem to be xml, for which I think only xsl stylesheets can be used.
Get the docbook-xsl package from here and use an xsl processor that's available on your system, e.g. xsltproc
Converting single files is quite easy:
xsltproc /path/to/docbook-xsl/html/docbook.xsl singlefile.xml > singlefile.htmlDunno how it deals with collections of several docbook documents though.
You can even make aolserver do the conversion, if your ns_xml was compiled with xsl support!
The docbook-primer.html document from aD (in the acs-core-docs package) mentions some customized stylesheets especially for ACS documentation - I wonder if those are available?