Heh, sorry to have fulfilled your prophecy. But, weren't you deploying a schema-free SGML app by virtue of not using implied end tags a couple of years before? Because that sure sounds like XML to me...
BTW, it's mentioned in another thread above that you're not sending a Content-Type header — are you doing that on purpose? I haven't tried doing that since HTTP/0.9 days and I'm surprised it works (i.e., that modern browsers sniff the body and render it as HTML).