If you use Safari rather frequently on your jailbroken iPhone, iPad, or iPod Touch you may want to check out BackForwardList for Safari. The main purpose is to enhance the functionality of the back and forward buttons.
Instead of tapping to go back a page, you can hold down on the back or forward button to gain quick access to your history. I've found this useful when I want to go back to a site I was browsing a few pages back. It's much easier than just tapping on the back button multiple times.