Superfish Enahnced Keyboard Accessiblity

Superfish Enahnced Keyboard Accessiblity

Hi,
Superfish is an excellent product. After a thorough review of nearly 20 different  CSS menus, I've come to the conclusion that the superfish menu is the most fully featured one. However, there is just one small area that it is lacking. Keyboard support is available via tab and enter, however I would like to see it improved so that you can also navigate using arrow keys. The UDM4 drop down menu achieves this, however this system doesn't use jQuery and the keyboard accessiblity doesn't work in the latest RC of IE9.
 
Any chance of adding cursor keys in to the keyboard accessibility at all?