Lachlan Hunt:

>   In the past, I have used the <hr/> element for breaking up 
> sections of lists (currently ul) used for navigation menus, 

...
 
> File
>   New
>   Open
>   _____
>   Save
>   etc...
 
>   If there was a <ligroup> (list item group) tag available, ... like
>   <optgroup> for <select> in current HTML forms. ...<dlgroup>, 

I don't see option groups (or the suggested dlgroups) as really all 
that different from list groups.  Why not just <group>?

> Currently there is no other way to do this with div or any other 
> element, since lists can only contain <li> or other lists.

And as long as the list items are being redefined, why not just 
allow spans or divs in between the list and the item?  

I suppose someone could use the <div> to sneak in other tags -
but these can already occur within the <li>.  Leaving out the 
<li> completely might be annoying, but is it really any worse
than what agents have to cope with already, in practice?

-jJ