Safari in iOS 6 offers a fullscreen-mode only for Landscape. FullScreen for Safari not only adds a FullScreen mode for Portrait-Orientations, but offers great new Gestures and Actions.
It adds new multi-touch gestures which can be assigned to actions like reload, scroll down/up, next tab…
Examples: Pull the browser view in one direction to switch tabs, Swipe with 2 fingers to switch between tabs, open a bookmarks with a tripple tap or simply add a page as bookmark by tapping twice and holding down the finger for a second…. and many more.
FullScreen for Safari is available for USD 2.19 in the CydiaStore. Owners of the iPhone version can get the iPad version at a reduced price of only USD 1.29.