It's often discussed, so I thought I'd make a poll, I'd be very interested in seeing what everyone thinks, and whether you want it or not. I don't like the idea of multi-tasking on the iPhone OS, it's usefulness would be very limited. I'm sure if Apple implemented it it would be great, but they won't unless it can be implemented in a seamless and perfect way. Since all of the applications on the iPhone OS run full screen, you'd never be able to have multiple apps open at the same time - that's not something that will ever change and is probably one of the most important things about multi-tasking. There aren't really any other idea's that would work very well, even if you had some kind of system to switch between apps like Expose... what's the point? You are still only using one app at a time filling the entire screen, it's draining more battery, using more processing power - potentially causing a problem with apps not working in certain combinations, and adds a slight level of unnecessary complexity to managing apps.