Word to HTML/XML

Surprised there isn't some kind of web-based utility for converting Word documents to XML or HTML. When I have time, I really have to figure out how to do this. It looks eminently doable with open source stuff, but appears to involve rebuilding or recompiling the server, an operation further complicated by the fact that my servers are on Windows machines. Anyway, some key resources:

"From Word to XML" (xml.com)

wvWare

antiword

cygwin