The "home" of HTML is, was, and will continue to be as far into
the future as I can see:
The editor of the HTML 3.0 specification is Dave Raggett. He's here
at W3C for a while, so the HTML 3 info on that page should be up
to date (if not, it will be soon, so that's the place to watch.)
HyperText Markup Language (HTML): Working and Background Materials
It has pointers to the latest published draft, plus pointers to various
development areas like tables, internationalization, etc.