SwitcherLand cydia tweak lets you use your switcher in landscape mode in addition to portrait mode! It also allows you to enable a landscape orientation lock. This tweak works well with many other app switcher tweaks.
SwitcherLand is a free cydia tweak which available on BigBoss Repo (default repo on Cydia, no need to add Cydia repo).
So yeah, this is another must-have Cydia tweaks for iPhone and iPod Touch. No reason to install this tweak on your iPad as iPad has already has this feature by default.
Requirements: iOS 5 or greater, iPad NOT compatible [DUH!]
Description: Lets you access your app switcher in landscape mode and enables you to set a landscape orientation lock