IBM Latex Browser (Score 2)

I recall seeing a few years ago (on IBM's Alphworks site??) the "TechExplorer" browser plugin, which accepts and displays a large subset of Latex macros. But remember the old mantra: HTML as an SGML application marks structure not appearance. Granted, it allows only a relatively small set of content elements (e.g. headings, text, multimedia, etc.)--that's why there is all the brouhaha around XML (and its derivatives) as a more flexible, extensible markup for applications where the full generality of SGML's structure definition is not needed.