Regarding aria-orientation, and how it applies to menus?

Hi,
According to the ARIA spec at
http://www.w3.org/TR/wai-aria/states_and_properties#aria-orientation
The three applicable widget types are scrollbar, separator, and slider.

Would it also be worth adding menu?

For example, this would come into play when there is a difference between the keyboard interactions for flyout menus versus dropdown menus.

E.G

Dropdown menu: http://whatsock.com/tsg/Coding%20Arena/ARIA%20Menus/Vertical%20(Internal%20Content)/demo.htm

Horizontal menu: http://whatsock.com/tsg/Coding%20Arena/ARIA%20Menus/Horizontal%20(Internal%20Content)/demo.htm