If you've ever used the Facebook or Sparrow app for iPhone, you will be familiar with the 'swipe to go back' feature which these apps have. Well this cydia tweak enables you to have that swipe to go back in every app. It's a highly useful gesture which enables you to go back quickly without having to reach up for the back button. I've found that it actually works amazingly well even though it's in BETA stage.
You will need to add another repo to access the tweak. Just add this to your Cydia sources - http://rpetri.ch/repo/ - It's completely free to download too.
You can check out other Cydia tweaks we have posted here - Cydia Tweaks for iPhone