Well for those who want a more Exposé-style app switcher for iPhone or any type of fast app switching on the still iOS 3.2 bound iPad then Multifl0w for Jailbreak might be worth checking out.
Multiflow is a multitasking interface which displays applications that are running and allows you to scroll left and right between them for quick switching. It also includes a snapshot of each of the back grounded applications and runs with backgrounder and you can background application by holding the home button.
Zoom out to reveal up to 9 apps tiled for easy access and re-arrange or remove them whether you like, thereupon tap to switch. $ 4.99 in Cydia.
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