jessetaverne/Touch-Screen-Friendly-Magento-Menus--Prototype-.
This script will allow touch screen users to easily access drop down menus through Magento's navigation. Currently tapping a menu item on an iOS/Android device will take you straight to the link you've clicked, with this script you'll be shown the associated dropdown menu on your first tap, and with a second tab you'll be able to follow your original target.