[Radiant] 3 level deep navigation tags

[dave4c03]

I would like to convert http://sanjosechiropractic.com/  to a radiant based
site. However, it seems to me radiant does not yet have navigation tags to
deal with a 3 level deep menu.   For example, see »
Home<http://sanjosechiropractic.com/index.html>» About
Chiropractic <http://sanjosechiropractic.com/chiropractic.html> » Straights
and Mixers for the sort of menu structure required.

What is the current status of work being done in this area?

I know it is possible to solve the problem by hard coding the menu
information into the site.  however, that is unacceptable, I need to
generate all navigational menus from the radiant file structure.