From: Nathaniel Borenstein <nsb(_at_)nsb(_dot_)fv(_dot_)com>
Excerpts from info-mime: 20-May-94 Re: application/postscript .. Rens
Troost(_at_)imsi(_dot_)com (518) 
Mosaic works for this. The html widget is reasonably encapsulated, and 
can be yanked out. I use: 
mhn-show-text/x-html: rxmosaic -dil %f 
Doesn't help much on a dumb terminal, does it? 
Well, there's
mhn-show-text/x-html: lynx %f
(lynx is a vt100 web browser from the University of Kansas; quite a
nice piece of software.  ftp://ftp2.cc.ukans.edu/pub/lynx/ )
Jay