Multiflow is an app that will let you background apps and switch between them like the palm pre’s smooth scrolling os system. As you can see in the video below this runs pretty smooth on an iphone 3g so I can imagine you will have a pleasant experience with this app no matter which generation iphone you have. As of right now there are no details on whether this will be a free or a paid but I will update you guys as soon as any info is made public. You can check out the apps website over at and follow the dev for up to date news