Okay, so I took another shot at scraping HTML with web services with another site that passes the HTML Tidy step. Luckily, this is a site that I already scrape using my own tool, so I have XPath expressions already cooked up to dig out info for RSS items. So, here are the vitals:

<p>Unfortunately, although it looks okay to me, this feed <a href="http://feeds.archive.org/validator/check?url=http%3A%2F%2Fwww.w3.org%2F2000%2F06%2Fwebdata%2Fxslt%3Fxslfile%3Dhttp%253A%252F%252Fwww.decafbad.com%252Fjlist.xsl%26xmlfile%3Dhttp%253A%252F%252Fcgi.w3.org%252Fcgi-bin%252Ftidy%253FdocAddr%253Dhttp%25253A%25252F%25252Fwww.jlist.com%25252FUPDATES%25252FPG%25252F365%25252F%26transform%3DSubmit">doesn&#8217;t validate yet</a>, but I&#8217;m still poking around with it to get things straight.  Feel free to help me out!  :)</p>