If you're Jailbroken yet still frustrated that you can't move between iPhone apps as easily as you can web pages in Safari (or Palm webOS users can in card view), ProSwitcher [Free beta - Cydia] is something to consider.
A front end to Backgrounder, which enables multitasking on a Jailbroken iPhone or iPod touch, duplicates the "Pages" metaphor in MobileSafari, including swipe-able switching and X-icon closing, and for good measure adds in the swipe-up-to-close gesture from Palm's webOS "Cards" interface.
