Landscape Lock Rotation: Lock Your iPhone, iPod Touch, iPad In Landscape Or Portrait Mode [Cydia Tweak]
Landscape Lock Rotation is a new tweak in Cydia that changes the behaviour of the Rotation lock icon located in your iDevice’s multitasking dock. The default rotation lock normally only locks for portrait orientation, but installing this tweak will lock the screen to the device’s current orientation, allowing landscape lock rotation as well as portrait.
Note: May not yet be compatible with SBrotator or qTweeter. Requires iOS 4.0.x and enabled Multitasking capability. Doesn’t include an icon or any settings visible on your iDevice.