I spent a week designing and engineering a custom iPhone Duo Test for my upcoming apps for myself.
You could ask why not use the Xcode 27.1 simulator? I say, 'Design is not how it looks but how it feels,' so I wanted to get the feel of the OS before getting into my design decisions. So if you are still trying to get your head around the iPhone Duo and need a guy to help you out, I'm open to work.