Creating different menus for different devices is very easy.

Anne, I apologize for the hijack of your support thread. Last post regarding this.

Take a look at the responsive classic to see how swapping the category tabs for a select is done.

Take a look at the responsive cold steel to see how the product listing header is swapped for the SNAF filter.

Simply using the minWidthHide and minWidthShow CSS classes at the appropriate CSS media query handles swapping with ease.

Keep the current mega menu for desktop.

Using minWidthHide and minWidthShow CSS classes to hide (ids and classes for the on hover CSS) and adding new (ids and classes for the on click CSS)

Example of new on click link

<a id="WHATEVER" href="<?php echo zen_href_link(FILENAME_DEFAULT, zen_get_all_get_params()); ?># " onclick="('');return false;">

Then using minWidthHide to hide both above and minWidthShow for the toggle menu on phones.

I have several new responsive plugins, just trying to find the time to get them packaged up.