I jailbroke and disabled multitasking. Here's some of the perks about doing this. 1. Almost every app opens smoothly every time (with the exception of Safari and Mail because those usually run in the background anyway). 2. Apps actually CLOSE FASTER! With multitasking enabled, there's a slight delay when hitting the home button. 3. My home button likes to double-click sometimes when pressing it once. This used to make the iPhone bring up the multitasking bar (which was pretty annoying). Now, I just have double-click set to "Home" so I never see the issue. 4. The iPhone 4 overall feels like it's running smoother. Scrolling, loading emails, opening apps etc. If your iPhone is jailbroken and you have the chance to disable multitasking, try it. I lived without multitasking for years and never really needed it. Now, it's 2010 and I STILL don't need it. The most important things on the iPhone multitask anyway. Anyway, try it out and see for yourself. PS: I know that some people are going to be like "why would you disable such a useful feature!?!?!". I know that you people are out there so I just wanna say right now that it's NOT FOR EVERYONE. I did it and I'm happy. You may not like it. PS2: I'm not crazy PS3: Maybe a little crazy PS4: Have fun with it.