While folders were my #1 most desired feature for the iPhone, multitasking was more of a nice-to-have for me. Those days are long gone however as I now find myself wanting multitasking for more and more apps by the week.
So while I respect Apple's reasons for being slow to adopt 3rd party app multitasking for the iPhone and - with up to 7 different APIs for developers to choose from to best suit their app - I'm very enthused about how Apple is implementing it, I'm getting anxious - if not foaming at the mouth - waiting for this feature to arrive.
It will be a great leap forward for the iPhone and its users. Take the example I used above with being able to pull up iTunes from any radio app. The possibilities for apps working with other apps in a symbiotic fashion are exciting and can only make the iPhone platform more appealing for developers and users alike.
So not only can I not wait for app-wide multitasking on the iPhone, I also can't wait to see how it expands the possibilities of what some of my favorite apps can already do.