Zephyr (by chpwn): Awesome Multitasking for iPhone and iPod touch

Zephyr is multitasking gestures for iPhone and iPod touch. From swiping up to show the multitasking switcher or quickly swiping to a different app, Zephyr is all you need to quickly and easily control multitasking.

Zephyr is AVAILABLE NOW in the Cydia Store! You should definitely go check it out.