> 
> 
> I'd like to see some official breakout of headers, footers and navigation 
> from content. Basically instead of just body, there would also be a header, 
> footer and navigation element.

Isn't that what link elements are about!  Unfortunately, browsers aren't
going to handle them sensibly.  This proposal might be workable, to the
extent that it can be handled almost entirely by an author style sheet.